MX-5 NC 2.5 Engine Swap & Replacement
200hp. 260Nm. NA.
Blown 1.8 or 2.0? Replace it with a 2.5 — same cost as another used engine, +50Nm more torque, dyno-tested and fully mapped, shipped across Europe. A direct 1.8/2.0-to-2.5L L5-VE swap: stock 126hp to 200hp, OEM reliability, no turbo lag.
Stock
126hp
167Nm
After Swap
200hp
260Nm
From €2,600 · Athens workshop & Europe shipping · 200+ swaps completed
The 2.5 Duratec swap on the dyno — every stage, real numbers.
MX-5 Dyno Predictor
Pick your engine and plan — the number is the real median from our own dyno, not internet claims.
1 · Your engine
Median of real pulls, customer names stripped. Ranges are p10–p90. Your result depends on parts, fuel and condition — book a dyno session and we log yours.
Real 2.5 swap builds — measured on our own dyno
Before → after, from actual customer cars. Names stripped, numbers not.
| Build | Before | After | Gain | Torque |
|---|---|---|---|---|
| NC 1.8 → 2.5 swap · still going strong | 125 hp | 191 hp | +66 | 160→249 |
| NC 1.8 → 2.5 L5-VE · Stage 1 | 125 hp | 215 hp | +90 | 168→266 |
| NC 1.8 → 2.5 L5-VE · Stage 2 | 125 hp | 221 hp | +96 | 168→271 |
| NC 2.5 · High Compressiondyno chart | 125 hp | 236 hp | +111 | 176→290 |
| NC 2.5 · Turbodyno chart | 175 hp | 344 hp | +169 | 225→455 |
| NC 2.5 · Big Turbo | 240 hp | 380 hp | +140 | — |
Every figure DIN 70020, crank, on our DynoRevolt 2WD. This is first-party data from our workshop — not manufacturer or internet claims.
Real DynoRevolt pull on our in-house dyno — 1.8 stock vs the finished 2.5 swap. Customer name removed.
Dyno-Developed Packages
From a clean Stage 1 remap to a full top-mount turbo build — every package developed on our dyno. MX-5 NC.
What is the MX-5 NC 2.5 Swap?
The MX-5 NC 2.5 swap is the most popular naturally-aspirated engine upgrade for the Mazda MX-5 NC (2005-2015). It involves replacing the factory 2.0L MZR engine (LF-VE, 160hp) with the larger 2.5L L5-VE from the Mazda 3, 5, or 6 — a direct bolt-on conversion within the same MZR engine family.
The result: 200hp and 260Nm of torque — a 59% increase in power and 56% increase in torque over stock — with zero turbo lag, OEM-level reliability, and a linear power delivery that transforms the MX-5 driving experience. The 2.5L swap is widely recognized across Europe as the single best value-for-money upgrade for the NC platform.
Why the 2.5L L5-VE?
Direct Bolt-On
Same MZR engine family — identical mounting points, bellhousing pattern, and wiring. No custom fabrication, no cutting, no welding. Factory-level fitment.
Massive Torque Gain
The L5-VE's 2.5L displacement delivers 260Nm vs 167Nm stock — a 56% increase that transforms mid-range response and eliminates the NC's well-known torque deficit.
OEM Reliability
The L5-VE is a production Mazda engine with millions of units worldwide. Proven in the Mazda 3, 5, 6, and CX-7. No experimental builds — just a larger, stronger factory engine.
Tuning Headroom
With a custom ECU calibration via MazdaEdit, the 2.5L produces 200hp NA. Add Stage 2 cams and headers to reach 220-240hp. Or add a turbo later for 350-450hp — the 2.5L block handles it.
At DMS Tuned, we have completed over 200 MX-5 NC 2.5 swaps for clients across Greece and Europe. Every build follows our strict DMS Engineering Standards — genuine Mazda components, new seals and bearings, and final dyno verification on our in-house 2WD dynamometer in Athens. We offer both in-house turn-key installations at our Artemida workshop and engine shipping with remote ECU calibration for DIY builders across Europe.
Whether you're a weekend canyon carver, a track-day enthusiast, or simply want the MX-5 NC to finally have the power it deserves, the 2.5L swap is the answer. No turbo maintenance, no boost threshold, no compromise — just 200hp of naturally-aspirated Mazda engineering, verified on dyno and backed by 200+ successful builds.
Why the MX-5 NC 2.5 Swap is the Best Upgrade
More torque, OEM reliability, zero lag — here's why 200+ owners chose the 2.5L over every other option.
Massive Torque Increase
The stock MX-5 NC 2.0L produces just 167Nm — barely enough to pull out of corners with confidence. The 2.5L L5-VE delivers 260Nm, a 56% increase that completely transforms mid-range response.
This isn't peak-only power like a turbo setup. The torque curve is fat and linear from 3,000 to 7,000rpm — exactly where you use it on road and track. The MX-5 finally pulls like it should.
Stock MX-5 NC 2.0
126hp
167Nm
DMS 2.5 Swap
200hp +58%
260Nm +56%
Reliability vs Turbo Builds
A turbo kit adds complexity: intercooler, piping, oil lines, boost control, and heat management. More parts mean more failure points. The 2.5L swap adds zero extra components — it's a factory Mazda engine in a factory Mazda car.
No boost leaks. No turbo bearing failures. No heat soak. No wastegate issues. The L5-VE has millions of units running worldwide in Mazda 3s, 5s, and 6s. It's proven, bulletproof, and requires nothing beyond standard maintenance.
Daily Drivability
The 2.5L swap makes the MX-5 NC a better daily driver. More low-end torque means less downshifting in traffic. Smoother highway cruising at lower RPM. No turbo lag when merging or overtaking.
It idles the same. It starts the same. It passes emissions the same. The only difference you'll feel is more power everywhere — without any compromise in fuel economy, drivability, or refinement. It's the upgrade Mazda should have built from the factory.
A complete kit, not "some assembly required"
There are four ways to get a 2.5 into an NC. Here is what each one actually costs you.
| Option | Price | What you get | Where |
|---|---|---|---|
| DMS Tuned Complete kit · ex works | from €2,600 | Inspected L5-VE, ECU calibration written for your VIN, oil pickup, install guide, remote support | Shipped EU-wide, 3–13 days |
| Racing Beat Europe Engine only | £5,982 | Their own page: "This is NOT a direct swap kit, there is work you need to do" | Shipped |
| eBay UK listing Supply & fit | £2,999 | Used JDM engine fitted. No calibration mentioned. | You drive to the Midlands |
| DIY from a breaker | ~€800–1,400 | Bare engine. No file. Rough running, check-engine light, no dyno. | Your driveway |
The engine is the easy part — there are thousands of L5-VE units in breakers across Europe. The calibration is the part nobody can hand you. A bare 2.5 in an NC without a proper file is a car that runs badly and throws codes.
Exactly what a 2.5 swap needs — genuine Mazda part numbers
The 2.0 and 2.5 MZR share the same architecture, but a clean swap needs specific new hardware. These are the genuine Mazda numbers. Every DMS kit ships with them already in the box — including the calibration, which no parts kit on the market includes.
| Part | Mazda part number | Note |
|---|---|---|
| Crankshaft bolt | LF01-11-406 | Not reusable — new every time |
| Crank diamond washers ×2 | L3K9-11-407 | Torque-to-yield, replace |
| Camshaft bolts ×2 | LF17-12-428 | Not reusable — new every time |
| Cam diamond washers ×2 | L3K9-12-429 | Replace |
| Pilot bearing (manual box) | YF09-11-303 | Only needed for manual — see below |
| VVT solenoid pigtail | WPT1251 | Carried over from the 2.5 |
| Balance-shaft delete kit | MST-02-0156 | Plugs the oil feed — see trap #2 |
| Serpentine belt | 6PK2305 / 6PK2223 | 6PK2305 with A/C · 6PK2223 without |
| Oil pick-up tube O-ring | L309-14-248 | |
| Oil pick-up tube | LFE2-14-240A | |
| Timing tool kit | CT4064 | Required to re-time the engine |
Keep from your 2.0
Oil sump, oil-filter mount, intake manifold, cam cover, crankshaft pulley, ancillaries (power steering, water pump, alternator, A/C), fuel rail, water outlet, engine mounts, oil-pressure switch, crank position sensor, coil packs, thermostat housing.
Carry over from the 2.5
Injectors and the VVT solenoid with its gasket. Everything else that touches the swap is either kept from your 2.0 or replaced new from the list above.
Delete
The balance shafts. The 2.0 sump can't house them, so they come out and the oil feed is plugged with the delete kit (MST-02-0156). A standard, reliable part of every NC 2.5 swap.
The three things that catch people out
- 1.The 2.5 oil pan doesn't clear the NC subframe. You reuse the MX-5's own 2.0 sump — the 2.5 pan physically won't fit.
- 2.That 2.0 sump isn't big enough for the balance shafts. So they're removed and the oil feed is plugged with the balance-shaft delete kit (MST-02-0156).
- 3.The crankshaft pulley must be transferred from your 2.0. It has a different number of teeth to the 2.5's — the crank sensor reads off it, so the wrong pulley means the car won't run right.
Running a manual? Two extra parts
The donor 2.5 almost always comes out of an automatic. That means the engine has to be re-timed with a timing tool (CT4064), and it needs a pilot bearing (YF09-11-303) to support the input shaft of your manual gearbox — the automatic never had one because it never saw the same shock loads. Miss this and the gearbox input shaft has nothing to run in. Both are in every DMS manual-spec kit.
Interested in the 2.5L Swap?
Get pricing, timeline, and engine availability from Yiannis
Typical Power Gains: MX-5 NC 2.5 Swap
Measured on our in-house 2WD dynamometer. No estimates — real numbers from real builds.
| Stage | HP | Torque |
|---|---|---|
| Stock NC 2.0L | 126hp | 167Nm |
| 2.5L Swap | 200hp | 260Nm |
| Stage 2 | 220hp | 270Nm |
| Stage 3 | 240hp | 280Nm |
| 2.5L Turbo | 250-430hp | 300-490Nm |
All figures wheel-hp measured on in-house 2WD dynamometer — DMS Tuned, Artemida, Athens
Interested in 250hp+? View our Turbo KitMX-5 NC Gains Calculator
Real dyno-verified power estimates
Stock
126hp
167Nm
2.5L Swap
200hp
260Nm
Our Dyno. Our Numbers.
Not just Mazda — every marque, measured on our own DynoRevolt. From a stock 1.8 to 700+ hp builds. Real pulls, not brochure figures.
4,800+
Real dyno pulls
712 hp
Biggest build
30+
Brands tuned
17 yrs
On the rollers
Power solid, torque dashed. Every curve is a real DynoRevolt pull on our in-house dyno — customer names removed.
Horsepower
126hp
200hp
+59%
Torque
167Nm
260Nm
+56%
Displacement
2.0L
2.5L
+25%
Builds Done
200+
All figures measured on our in-house 2WD dynamometer — DMS Tuned, Artemida, Athens
Everything in the Swap
A complete, no-compromise conversion — everything you need, nothing you don't.
2.5L L5-VE Engine
Sourced, inspected, compression-tested. Same MZR family — direct bolt-on to your NC.
Balance Shaft Delete
Removes FWD-only balance shaft, seals oil feed. Less rotating mass, faster revving.
Mounts & Hardware
Engine mounts, wiring integration, adapters — everything for a factory-clean install.
ECU Calibration
Custom MazdaEdit tune optimized for the 2.5L. Fuel maps, ignition timing, VVT — dialed in on dyno.
New Clutch & Oil System
Clutch rated for 260Nm, new oil pump, gaskets, and seals. Built for reliability.
Dyno Verification
Before & after power runs on our in-house 2WD. You get a verified power sheet with your build.
LIVE ΑΠΟ ΤΟ ΕΡΓΑΣΤΗΡΙΟ
See the Power. Hear the Sound.
Real dyno runs, real builds, real sound. No marketing footage — just engineering.
Full Dyno Run — 2.5L L5-VE
200+hp / 260Nm verified on in-house 2WD
NC Live Dyno — GReddy Data
Workshop Build in Progress
Dyno Ramp — Power Check
Exhaust Note — 2.5L Sound
NC at DMS Workshop
2.5L Swap Packages
From engine-only to full turn-key builds. Every package includes DMS quality assurance.
THE QUICK SWAP
The complete swap, ready to run.
180hp / 245Nm
from €2,600
Engine + tuning kit + remap. Everything standard.
You want the 2.5 done right — engine, the parts it needs, and a real remap. Not a bare block.
- 2.5L L5-VE engine — inspected & compression tested
- Balance shaft delete kit
- Full service kit — gaskets, seals, oil filter, spark plugs, belts
- MazdaEdit tuning kit (cable + licence)
- Custom remap — standard, 180hp / 245Nm on the stock manifold
- Bolt-in — same mounts, same gearbox
- 1.8L owner: + €350 (2.0 ECU with base map) + €80 (oil pickup) = €3,030
Price Breakdown
2.0L owner: €2,600 all-in — engine + BSD kit + full service kit + MazdaEdit kit + custom remap. 1.8L owner: + €350 (2.0 ECU with base map) + €80 (oil pickup) = €3,030.
THE PERFORMANCE SWAP
Now the 2.5 breathes.
190-200hp / 250Nm
from €3,150
Quick Swap + free-flow 45mm headers. Proper flow.
You want real performance — the free-flow 45mm headers that let the 2.5 make its power, re-tuned for them.
- Everything in The Quick Swap (engine + BSD + full service kit + MazdaEdit kit + remap)
- Free-flow 45mm 4-1 headers
- Re-tuned for the headers
- 190-200hp / 250Nm dyno-verified
- Unlimited revisions for basic mods
- Direct WhatsApp support with Yiannis
Price Breakdown
Quick Swap €2,600 + €550 (free-flow 45mm headers) = €3,150.
THE FULL POWER BUILD
I want it ALL.
220hp / 270Nm
from €4,000
Maximum NA power. The complete DMS experience.
You want every last horsepower from naturally aspirated. Stage 2.5 cams on top of the Performance Swap.
- Everything in The Performance Swap
- DMS/Kelford Stage 2.5 camshafts
- Full custom cam calibration (VVT optimization)
- Extended dyno development session
- Peak power: 220hp / 270Nm verified
- The most powerful bolt-in NA 2.5L build available
- Build certificate with dyno sheet
Price Breakdown
Performance Swap €3,150 + €850 (Stage 2.5 cams) = €4,000.
Custom turbo builds (350-450hp) available on request.
Save Your Build
Leave your email and car details — we'll save your configuration and Yiannis will follow up with a personalized recommendation.
Installation Options: Athens & Europe
Two paths to your 2.5L build — whether you're local to Athens or anywhere in Europe.
Athens Workshop
Turn-key · 5-7 days · Artemida, Greece
Drop off your MX-5 at our Artemida workshop. We handle everything: engine sourcing, preparation, installation, ECU calibration, and dyno verification. You pick up a finished, verified build.
- Complete engine sourcing & preparation
- Professional installation by DMS team
- Custom ECU calibration (MazdaEdit)
- Dyno verification on in-house 2WD
- New clutch, seals, gaskets included
- Power sheet & build documentation
from €4,500
Europe-Wide
Engine shipping · Remote tuning · DIY support
We ship swap-ready 2.5L L5-VE engines and component kits across Europe. Install at your local shop or DIY, then get your ECU calibrated remotely via our DMShub platform — the same DMS tune, wherever you are.
- Swap-ready L5-VE engine shipped to your door
- Complete swap component kit available
- DMS Mandatory Specs List for your builder
- Remote ECU calibration via DMShub
- Engineering support throughout the build
- Shipped to: EU, UK, Switzerland, Norway
from €2,000 + shipping
Real 2.5L Builds Across Europe
From Athens to Amsterdam, Berlin to Barcelona — MX-5 owners across Europe trust DMS for their 2.5L swap.
2.5L Swap — Munich
Engine shipping + remote tune
"Engine shipped to my workshop in Munich. DMS remote-tuned via DMShub. 198hp on my local dyno. Perfect communication throughout."
2.5L Swap — Milano
Turn-key at Athens workshop
"Drove to Athens for the full turn-key swap. 5 days later, picked up a completely different car. The torque is unreal for an NA MX-5."
Remote Support — Barcelona
Remote engineering support
"My local mechanic did the physical swap. DMS provided the specs list, sourced the engine, and calibrated the ECU remotely. Flawless process."
Track Build — Amsterdam
Stage 2 track build
"Stage 2 build with cams and headers for track days at Zandvoort. The car pulls to 7,500rpm without hesitation. Best mod I ever did."
Greece
Germany
Netherlands
Italy
Spain
France
UK
Austria
Belgium
SwitzerlandOur 2.5L Swap Builds
From Athens to Amsterdam. Every build dyno-verified and road-tested. We don't fake it — we build it.
Mazda MX-5 NC 2.5 185hp
Built Right. Built to Last.
Every DMS build follows our strict engineering protocol. OEM-grade components, precision assembly, and dyno verification — no shortcuts.
Timing Integrity
New genuine Mazda friction washers & stretch bolts. Critical for precise timing chain tensioning on the L5-VE. No reused hardware.
Sealing Excellence
All main seals (front/rear) and gasket sets replaced. OEM Mazda seals for zero leaks and maximum longevity.
Drivetrain Precision
New pilot spigot bearing for perfect gearbox mating. New clutch rated for 260Nm+. Prevents vibrations and premature wear.
Turn-Key Workshop Experience
At our Athens workshop (Artemida), DMS handles everything: sourcing, preparation, installation, ECU calibration, and dyno verification. Hand over the keys — pick up a finished, verified 2.5L build in 5-7 days.
- Complete parts sourcing
- OEM Mazda seals & gaskets
- ECU calibration on in-house 2WD
- Power sheet included
- 5-7 day completion
- Europe-wide engine shipping
Build Your Own. Order Online.
Individual components, engines, and performance packages for DIY builders.
VVT Solenoid Harness Adapter
€50Essential for VVT operation on the 2.5L. Connects donor solenoid to NC loom.
DMS Balance Shaft Delete Kit
€50Removes FWD balance shaft, seals oil feed. Faster revving, less rotating mass.
EGR Precision Blanking Kit
€60Clean intake, cooler combustion. Eliminates carbon buildup.
2.5L L5-VE Engine — Swap Ready
from €2,000Sourced, inspected, compression-tested. Standard and low-mileage options.
Explore More MX-5 NC Programs
The 2.5L swap is just the beginning. Explore our full MX-5 NC performance ecosystem.
MX-5 NC Turbo Kit
Ready for 250-430hp? Our bolt-on turbo kits work on 1.8L, 2.0L, and 2.5L engines. Many clients start with the 2.5 swap and add turbo later for the ultimate build.
View Turbo KitMX-5 ECU Tuning
Not ready for a full swap yet? Our MazdaEdit ECU calibration unlocks hidden performance from your stock engine. Available in-person at Athens or remotely via DMShub.
View ECU TuningMazdaEdit Setup Guide
Running your own MazdaEdit setup? Our step-by-step NC guide covers the J2534 cable, software install, first read and first flash — so the swap calibration lands cleanly.
Read the Setup GuideWatch a 2.5 swap on the dyno
Real DMS NC 2.5 (L5-VE) build — Stage 2 cams, custom-tuned to 208 hp.
MX-5 NC 2.5 Swap FAQ
The 2.5L L5-VE swap is a direct bolt-on for all MX-5 NC models (2005-2015). The engine belongs to the same MZR family as the stock 2.0L, making it a factory-level fit without custom fabrication. NB models can also receive the swap with minor additional modifications.
A stock 2.5L L5-VE swap with our ECU calibration produces approximately 200hp and 260Nm — a massive jump from the stock 126hp / 167Nm. With Stage 2 upgrades (cams, headers, intake), we achieve 220-240hp naturally aspirated, all verified on our in-house 2WD dyno.
Absolutely. The L5-VE is a production Mazda engine used in the Mazda 3, 5, and 6. It is inherently reliable with proper installation. Our DMS Engineering Standards ensure every build uses OEM-grade components: genuine Mazda friction washers, new seals, pilot bearings, and a fresh clutch rated for the increased torque.
It depends on your current engine and goals. The Quick Swap (engine + shipping + balance shaft delete) starts at €2,600 for 2.0L owners or €3,030 for 1.8L owners (includes the 2.0 ECU with base map + oil pickup). The Performance Swap with headers + custom tune + MazdaEdit kit is €3,150. The Full Power Build with Stage 2.5 cams (220hp) is €4,000. All prices include EU-wide shipping.
A complete turn-key swap takes 5-7 working days at our Artemida (Athens) workshop. This includes engine preparation, installation, wiring, ECU calibration on our in-house 2WD dyno, and final quality checks. You hand over the keys and pick up a finished, dyno-verified build.
Yes. We offer remote ECU calibration for DIY builders worldwide via our DMShub platform. We provide a detailed DMS Mandatory Specs List to ensure your build meets our engineering standards. Once your engine is installed and verified, we calibrate your ECU remotely using MazdaEdit.
The 2.5L swap delivers linear, naturally-aspirated power with zero turbo lag and OEM reliability — ideal for street and spirited driving. A turbo kit offers higher peak power (350-450hp) but requires more supporting mods, maintenance, and has a different power delivery. Many of our clients start with the 2.5 swap and add a turbo later for ultimate power.
Yes. We ship 2.5L L5-VE engines and complete swap component kits throughout Europe — including EU countries, the UK, Switzerland, and Norway. We also support remote tuning clients worldwide through our DMShub platform, providing engineering support and ECU calibration remotely.
DMS Tuned is the leading MX-5 NC 2.5 swap specialist in Europe, based in Athens, Greece. For local builds, our Artemida workshop offers full turn-key installations with dyno verification. For clients elsewhere in Europe, we ship swap-ready engines and provide remote ECU calibration via DMShub. We have completed builds for clients in Germany, Netherlands, France, UK, Italy, Spain, Austria, and more.
With the 2.5L swap producing 200hp in an MX-5 NC weighing approximately 1,100kg, you get a power-to-weight ratio of about 182hp per tonne — comparable to sports cars costing 3-4x more. With Stage 2 upgrades (220hp), this improves to 200hp per tonne. The lightweight MX-5 platform makes every horsepower count.
YOUR BUILD STARTS HERE
Ready for 200hp NA?
200+ swaps completed. 0 engine failures. Your MX-5 NC deserves the 2.5L treatment.
Το MX-5 σου
vs Supercars.
1,100kg. 350hp. 3.14 kg/hp. Αυτός ο αριθμός τρομάζει Ferrari, GT3, M4.
3.14kg/hp
Power Ratio
3.9s
0-100 km/h
~€15K
Total Build
~€15K
DMS MX-5 NC
€150K
Supercars
"Same speed. 1/10th the price. All the soul."