Performance | Engineering


Providing race parts & service for MG, Austin Healey and Lotus cars since 1998

Racing Heritage

Father and son team John and Richard Bridge both race Austin Healeys in the Midget and Sprite Challenge

Our love for racing (winning!) has inspired us to seek out improvements in all areas of our cars. Each product has undergone extensive testing in real race cars before we offer them for sale - because we don't sell anything that we wouldn't use ourselves.

Latest Products

Midget/Sprite 1275 sump baffles kit

Race spec sump baffle kit with flap valves and windage tray. for inline 1275cc engines.   One-way valves in the baffle stop oil starvation due to surge. Windage tray reduces washing and pumping losses.  No welding required to fit. windage tray removable for sump cleaning.


Cometic Race Head Gasket

This is a special Cometic MLS gasket made exclusively for mamba motorsport  for 73.5mm offset bored A series engines. It has 74mm bore through the gasket to allow the necessary 0.010" clearance around the bore to avoid any gasket overlap into the bore when fitted.  Avoids detonation due to gasket hotspots Allows piston-in-head high compression engines Can be used for 74mm bore applications where the piston doesn't protrude the bore.   Available from stock in 0.030" and 0.040" thickness - other options in 0.004" increments available by special order and cost will vary


Genuine APT VP8C Camshaft for Mini / Spridget A Series race engine

Genuine APT VP8C Camshafts ground by Dave Anton in the USA to the highest tolerances - not to be confused with inferior copies. Developed by Crane/APT and Vizard, these very special camshafts produce exceptional power across the rev range making them "probably the best conventional race/rally cam available" - Vizard In our race engines we have been achieving 105+ bhp/litre (145bhp 1380cc) using this camshaft. They idle well and have excellent torque in the mid-range when compared to long duration race cams.  Power Band 4000 - 7800 rpm. Usable to 8400rpm Please select Extra Carriage at checkout for this item.


245mm (9.6") Midget / Sprite big brake kit - front

Complete kit suitable for race cars and fast road/track vehicles. 4 pot alloy calipers (Wilwood) 245mm solid discs (9.6") Fittings Price INCLUDES VAT The Mamba big brake kit fits under most 13" alloy wheels and steel competition wheels like Weller. A replacement for the caliper and rotor gives a great road upgrade with m1144 pads or consider m1155 or bp20 for track days. For circuit racing we recommend the Hawk DTC30. Pads not included in kit. Fitting instructions 


Midget Steel Flywheel Kit - 180mm

The perfect solution for UK racers: 180mm steel clutch cover + bolts 180mm organic, sprung center plate Roller release bearing and billet carrier Lightweight steel flywheel (2.7kg) Saving over 4kg from the standard setup, this package provides a clutch that can cope with any A series race engine torque along with a smooth, progressive take-up that protects the transmission and low rotating mass to help protect the crankshaft. AND it fits in the bell housing without having to grind anything away. ARP crankshaft bolts are +£35.00   Please add £60.00 if you would like us to assemble and balance the assembly.  Note if you have the crank out of the engine we recommend getting your full assembly balanced.


Distributor - full race (Red spec) + Electronic ignition

Mamba have teamed up with a main-stream distributor manufacturer to produce a special race-spec A and A+ race distributor. In answer to recent problems with quality from our usual suppliers we felt there was no option but to produce a new high quality product with all the features a club racer needs. Proper race spec rotor arm Electronic ignition  Race advance curve designed for long duration ( >286 degree) cams. Finished with long silicone leads so they don't suffer vibration fatigue We believe this is now the best A series race distributor on the market. Available for A or A+ with either side or straight cap. Please specify your preference in the notes of your order. 


3 cylinder pedal box with balance bar & master cylinders

Triple cylinder pedal box fits in standard midget / sprite mounting. Complete with balance bar, cylinders and cover. Clutch cylinder has integral reservoir and brake cylinders use a shared remote reservoir (due to the fitment angle in the car, an integral reservoir is less suitable but we can provide this as an option if required). Update: 2019 version has additional slot for mounting remote bias adjuster cable. Master cylinder sizes: 0.5 (1/2)" .625 (5/8)" .700" .75 (3/4)" Add the required master cylinder sizes in the comment box after confirming your order.


Midget to MGB damper conversion kit

Mamba have designed a front suspension upgrade package that replaces the standard radial arm damper units. By using an MGB Shock Absorber the top king-pin mounting point is significantly strengthened, thus improving it's location and providing more consistent geometry. The 'Shock' is mounted on Mamba designed laser cut slider plates, which allow the camber angle to be set to better suit the application, i.e. circuit, sprint or hill climb. Includes plates, all bolts, nuts, trunnion bushes and instructions. MGB dampers are not included. Supplied unpainted so you can colour match to the chassis. may require the inner wings to be trimmed to clear anf brake lines moved slightly.


Midget adjustable camber front suspension kit

Laser-cut steel mounting plates and fitting kit. The plates sit between the damper unit and the chassis turret to allow fine suspension adjustment WITHOUT replacing the trunnion.  Set your camber to any value 1.0 - 4.0 degrees. Allows you to dial out any minor inconsistencies. Note: the plates raise the inner pivot centre which gives improved toplink geometry for cars using shorter than standard springs. This results in less bumpsteer and less Camber gain in roll  (ie more grip!) Kit includes: plates, nuts, bolts and instructions. Supplied unpainted so you can colour match to the chassis. may require inner wings to be trimmed and brake pipe moved slightly. We have full alignment setup in-house and can fit these and setup the camber and toe for you. Call for setup price.


1380 Fast road engine for Midget / Sprite / Minor

Reconditioned 1380 in line A series engine: Suit MG Midget/A H Sprite/Minor etc. MG Midget A series thick flange 11 stud block freshly bored 73.5mm (1380cc) New high quality cast pistons Crank uprated to Marina crank with Midget flywheel flange New MET270 billet and drilled fast road camshaft Vernier cam drive with Iwis duplex chain New Metro hi-flow oil pump New no bypass water pump with glass filled impeller Oil galleries tapped & plugged and all new core plugs - block chemically cleaned. Standard "Big Valve" 11 stud head with hard exhaust valve seats EN24 competition head stud set ARP rod bolts MED roller tipped rockers Block decked to give 10.5:1 static compression Lightened Midget flywheel with good clutch & cover & new ring gear Bottom end with clutch & flywheel balanced. Aldon points type vac distributor The price is based on a suitable exchange engine. That means a serviceable in line thick flange 1275 A, A+ Marina or A+ Ital engine, not sleeved and no more than +0.040" bores.If there is no exchange unit available there will be a £650 surcharge. Collection only and payment by BACS before or cash on collection please (no paypal on this one). An invoice will be provided with limited warranty.Any questions please ask .


Steel flywheels (A-series)

Steel flywheels for high performance Midget & Sprite. 2.7kg (4.5kg less than standard) Featuring integral ring gear for balance, weight and safety.  Chromoly steel  - not cheaper EN8 Available for 180mm or 184mm clutches - please specify in comments when ordering. (+£10.00 if you require bolts and dowels)


Steel Race Clutch Cover 180mm

180mm Steel race clutch cover is light and designed to handle torque outputs well in excess of even our long-stroke 1496cc race engines. No pad design Requires a modified or race flywheel. Clutch plates sold separately All our clutches are built to order so allow 4-6 weeks for delivery (call if you need sooner)


Road spec 180 clutch cover

A heavier design of the 180mm clutch cover more suitable for spirited road use rather than race. Requires a modified or race flywheel Clutch plates available separately All our clutches are built to order please allow 4-6 weeks for delivery (or call us)


180mm Clutch plate - Organic

180mm clutch plates for our 180mm steel covers. For Midget gearboxes (including SCCR and Dog) we recommend sprung centre organic plates as they offer protection to the transmission.


180mm Clutch plate - Cerometallic

180mm clutch plates for our 180mm steel covers. For Midget gearboxes (including SCCR and Dog) we recommend sprung centre organic plates as they offer protection to the transmission.


Billet Alloy Race Clutch Cover 184mm

Full race, lightweight billet alloy lug-type clutch cover. The lightest cover available for a Midget.  Friction plate available separately. Requires a race-spec flywheel. Clutch covers are made to order. Delivery in 4-6 weeks, please call to check before ordering.


JWIS Ultimate Simplex Race Timing Chain - A series 1275

These are proper, JWIS top quality automotive cam drive chains, made in Germany, NOT cheap industrial quality chain as most of the factors offer. It has taken me over a year to get access to this product - and believe me I don't fit cheap timing chains to expensive race engines if I can help it - no point in taking all that time & effort to get everything right to have it go off in 1/2 a season because the timing chain has stretched beyond use or worse still................! If you are running an inferior product on your £4000 engine, you really should think again! Available as Duplex or two types of Simplex (for those wanting the very minimum weight/drag on their cam drive)