ECU · ENGINE · POWERTRAIN

ENGINEERED
TO WIN.

Race-proven engine management, BMW S65 engine packages and specialist components—designed, built and calibrated under one roof.

Explore S65 engines ↗Explore Syvecs S65 & S85 ECUs

30+YEARS RACING EXPERIENCE

25+YEARS ENGINE MANAGEMENT

1500 BHP2WD HUB DYNO

IN-HOUSEENGINE DYNO CALIBRATION

01 / CONTROL

COMPLETE POWERTRAIN CONTROL

The ECU is not an
afterthought.

Our control systems are developed alongside the engine, gearbox and chassis. That means factory-quality integration with the flexibility, logging and protection demanded by serious road, track and race applications.

HOWELL / SYVECSONLINE

ENGINE SPEED8,240RPM

01 Direct replacement ECU packages
02 Standalone engine control
03 DCT gearbox integration
04 Motorsport wiring solutions

E9x STANDALONE CHASSIS

Howell / Syvecs E92 M3 ECU

Howell standalone firmware, ready to form the control centre of an S65 conversion or dedicated race installation.

ECU PACKAGE£4,125+ VAT

OPTIONAL SENSORS & CONTROLS

£185 Bosch Motorsport oil-pressure sensor kit with loom

£165 Knock-sensor package

Configure package and review specification ↗

BMW M5 / M6 · S85 V10

Howell Race Engineering S85 V10 ECU

For custom-built chassis, or BMW M5 and M6 applications using either a DCT or manual gearbox.

ECU PACKAGE£4,920+ VAT

OPTIONAL WIRING & SENSORS

£230 BMW M5/M6 wiring package

£160 S85 V10 knock-sensor package

£180 Bosch Motorsport oil-pressure kit

View and order the V10 ECU ↗

BMW E9x S65

Race engine
programme.

Six developed specifications. One goal: dependable performance. Every package requires an exchange engine and can be run-in and calibrated on our engine dyno before installation.

S65 engine buildsBuilt in-house

Howell steel conrodsEngineered for the S65 V8

S65 crankshafts & conrodsRace engine internals

Precision engine workWorkshop video

Dyno developmentWorkshop video

4.0 litre S65

CLUBMAN SPEC

PACKAGE TOTAL£14,800.00+ VAT

A properly built S65 engine developed for fast-road and track-day use.

Standard crankshaft · Mahle PowerPak pistons · Howell steel conrods

View full specification +

Standard S65 crankshaft
Mahle PowerPak forged pistons
Howell Race Engineering steel connecting rods
Ported cylinder heads
Uprated 292° camshafts
Uprated valve springs
Uprated head studs

4.2 litre / 94 mm bore

525 BHP

PACKAGE TOTAL£18,700.00+ VAT

A 94 mm-bore S65 package delivering 525 BHP.

4.2 litre capacity · 94 mm bores · 525 BHP

View full specification +

4.2 litre S65 engine
94 mm cylinder bores
Target output: 525 BHP

4.4 litre stroker

498–510 BHP

PACKAGE TOTAL£22,543.00+ VAT

82 mm steel crank, steel rods and forged PowerPak pistons for Alusil bores.

292° camshafts · CNC-ported heads · ARP hardware

View full specification +

4.4 litre stroker assembly — £10,403
Gaskets, bearings & ARP head bolts — £1,070
Strip, rebuild & cylinder-head rebuild — £6,300
292° camshafts & springs — £3,830
Standard-valve CNC head porting — £940

4,150 cc / 94 mm bore

525–540 BHP

PACKAGE TOTAL£21,650.00+ VAT

Alusil-compatible forged pistons, steel rods and big-valve cylinder heads.

292° solid-lifter cams · CNC ports · full head rebuild

View full specification +

4,150 cc 94 mm block conversion — £3,500
Gaskets, bearings & ARP head bolts — £1,070
Strip, rebuild & cylinder-head rebuild — £7,000
Big-valve CNC cylinder heads — £5,100
Solid-lifter cams, springs & conversion — £4,980

4,550 cc stroker

540–560 BHP

PACKAGE TOTAL£33,103.00+ VAT

82 mm steel crank with steel liners and forged 94 mm race pistons.

Big-valve CNC heads · 292° camshafts · ARP hardware

View full specification +

4,550 cc stroker assembly — £11,603
Steel liners & forged 94 mm pistons — £5,200
Gaskets, bearings & ARP head bolts — £1,070
Strip, rebuild, head rebuild & porting — £6,300
292° camshafts & springs — £3,830
Big-valve CNC cylinder heads — £5,100

4,550 cc race engine

590–610 BHP

PACKAGE TOTAL£34,953.00+ VAT

The full specification: steel-lined block, 94 mm pistons and solid-lifter heads.

Solid-lifter conversion · big-valve CNC heads · 292° cams

View full specification +

4,550 cc stroker assembly — £11,603
Steel liners & forged 94 mm pistons — £5,200
Gaskets, bearings & ARP head bolts — £1,070
Strip, rebuild & cylinder-head rebuild — £7,000
Big-valve CNC cylinder heads — £5,100
Solid-lifter cams, springs & conversion — £4,980

FLAGSHIP

AVAILABLE OPTIONS

£700 Trap-door sump

£9,313 Autoverdi dry sump

£3,900 Race headers

£800 Flex-fuel mapping

£2,850 Two-day dyno run-in

2026 guide prices. All prices are subject to VAT unless exported. Engine packages require a suitable customer-supplied donor engine.

BMW S65 V8

S65 rebuild
parts.

Browse S65 rebuild parts by category. Contact Howell Race Engineering with your registration, chassis number or engine specification so we can confirm the correct parts.

Browse the shop ↗

Brand, part number and exact specification will be confirmed before supply. Prices exclude VAT unless exported.

03 / SYSTEMS

BEYOND THE ENGINE

Built as a system.

From the first sensor signal to the rear wheels, we develop the parts and controls that make a complete package work.

FEATURED 01

BMW E9x M3 · S65 V8

Syvecs E9x

Complete direct-replacement ECU package for manual and DCT E9x M3 models.

FROM · EX VAT£4,125

View and order ↗

FEATURED 02

BMW M5 / M6 · S85 V10

S85 V10

For custom chassis, BMW M5 and M6 applications using DCT or manual gearbox.

FROM · EX VAT£4,920

View and order ↗

FEATURED 03

BMW E92 M3 · S85 V10 CONVERSION

E92 M3 V10 Package

Custom fabricated hardware, plug-in Howell Syvecs engine management and full E92 M3 chassis integration.

PACKAGE PRICE · EX VAT£15,600

View full package ↗

E9x oil breather installed — Installed on BMW E9x

Aluminium oil breather tank — Hand-fabricated tank

Complete breather kit — Complete installation kit

FEATURED 04

BMW E9x · TRACK & RACE

E9x Oil Breather Tank Install

Eliminates the venting of crankcase fumes and oil into the intake.

Complete installation — £1,150Rocker-cover plates only — £280Prices exclude VAT.

Complete kit Plates only

PRE-OIL PRESSURE2.0BAR

START-UP OIL PRESSURE DELAY0.00SECONDS

FEATURED 05

BMW E9x M3 · S65 V8

E9x S65 Pre-Oil System

Compact pumping system engineered to provide oil pressure before the engine makes a single revolution.

UP TO 2 BARBefore engine rotation

0.00 SECONDSStart-up delay

ULTIMATE PROTECTIONPre-start lubrication

PRICE · EX VAT£1,300

View and order

BMW E9x

S65 & S85 control

Direct-replacement and standalone ECU packages developed around BMW V8 and V10 platforms.

BMW DCT

Gearbox control

Integrated and standalone DCT control for conversions, race cars and specialist applications.

Custom E9x

Race-developed hardware

Pre-oiling, sumps, mounts, cooling solutions and bespoke in-house components.

Lotus

Elise, Exige & 2-Eleven

ECU, 2ZZ engine, Rotrex supercharger and transmission solutions developed through decades of Lotus experience.

PROVENDYNODEVELOPED

VALIDATION, NOT GUESSWORK

Built here.
Proven here.

Engine run-in, calibration and validation are carried out on our Froude G490 engine dynamometer. Complete installations can then be proven on our 1500 BHP 2WD hub dyno.

Controlled engine run-in
Fuel and ignition calibration
Safety strategies and data logging
Ready-to-race handover

HAVE A PROJECT?

Let’s make it
faster.

sales@howellrace.com ↗07506 795306 ↗

Unit 2 Silvergates, Fendyke Lane, Gorefield, Cambridgeshire, PE13 4NF

HOWELL RACE ENGINEERING

Tell us about your car.

Send your vehicle and package details directly to HRE.

ENGINEEREDTO WIN.

The ECU is not anafterthought.

Howell / Syvecs E92 M3 ECU

Howell Race Engineering S85 V10 ECU

Race engineprogramme.

CLUBMAN SPEC

525 BHP

498–510 BHP

525–540 BHP

540–560 BHP

590–610 BHP

S65 rebuildparts.

Gaskets

E9x S65 cylinder head gaskets — pair

Front cover gaskets

S65 sump gasket

Exhaust gaskets

Seals

Front crankshaft seal

Rear crankshaft seal

Spark plug tube seals

Bolts and fasteners

S65 ARP head stud kit

Sump nuts

Bearings

Throttle actuators

Reconditioned throttle actuator

Flywheels

E9x DCT M3 V8 TTV Super-Light flywheel

Spark plugs

Spark plugs

Filters

Oil filter

Chains and guides

Timing chains

Built as a system.

Syvecs E9x

S85 V10

E92 M3 V10 Package

E9x Oil Breather Tank Install

E9x S65 Pre-Oil System

S65 & S85 control

Gearbox control

Race-developed hardware

Elise, Exige & 2-Eleven

Built here.Proven here.

Let’s make itfaster.

Tell us about your car.

ENGINEERED
TO WIN.

The ECU is not an
afterthought.

Race engine
programme.

S65 rebuild
parts.

Built here.
Proven here.

Let’s make it
faster.