£2,115.00 exc vat
£2,538.00 inc vat
Out of stock
The C-AHT347RACE cylinder head is only really suitable on engines that have 0.040”, 0.060” or 73.5mm bores, this is due to the fact that the valve spacing is wider than standard which causes a shrouding effect ( impaired performance ) if fitted to std or 0.020”.
Independent Dyno tests and reports have shown this is the best head in market for value and performance.
Order ( C-AHT348RACE ) for the de shrouded version to optimize bhp / torque on std & 0.020" bores. Any race engine 1275cc - 1380cc will optimize bhp / torque from the de shrouding effect of this cylinder head.
Speak to NEIL BOOTH or Richard at York branch for all modifications required to fit this head as it is not a straight swop. Valve seat spacing means that a modification to the rocker cover is required and push rods are at a slight angle so check for clearance. Roller rockers are required to ensure pads are seated correctly on valves using C-AEG593 spacers alignment kit. A modified rocker cover is usually required and available as FP24 which has back machined to clear rockers. Manifold studs with UNC thread for alloy type heads only are included (6 of 53K547)
Mini Spares large valve alloy race ported and gas flowed head has race quality valves with special beryllium valve seats and special colsibro guides similar to those used on 8 port. Valves are spaced further apart to eradicate heat transfer causing cracking as found on old original cast heads. Weight approx 5.7kg.
Casting shape and profile is based on the 12G1805 "S" 940 casting design.
Machined for C-AEA526 height springs with our locating shims underneath.
With 37mm inlet and 31mm exhaust valves and titanium top caps plus 88G459EVO collets for ultimate strength. Combustion chambers are original 21.3 to 21.5cc
Advantages are weight and better cooling on a brand new head as old castings are becoming poor for reliabillty when modifying.
All heads are hipped and heat treated (annealed)from the foundry and pressure tested before machining and again after they are assembled but good quality flat head washers should be used.See C-AHT280
Use GEG300,TAM1521(BK450) or C-AHT189 cometic head gaskets only
Ring Mini Spares North for technical information and availablity of any special requirements if we can be of assistance.
Where the inlet ports are opened up tubes are put in to give full flow benefit. Suggested torque setting procedure in workshop manual sequence as follows
1st stage 15lbs/ft
2nd stage 30lbs/ft
3rd stage 40lbs/ft
final stage 45lbs/ft ===if using copper head gasket you can re torque to 45lbs but there is no need on cometic or multi layer steel type head gaskets.
£2,115.00 exc vat
£2,538.00 inc vat
Out of stock
EN24 Nickel Chrome moly steel studs, Competition head stud kit (11 studs, nuts & washers.) 4 long and 7 short.
This special kit was developed to replace the increasingly inconsistent standard items. The studs are manufactured in selected hi-...
Genuine Mini Spares Performance Copper/steel head gasket.
Based on the original AF460 pre 2000 design plus the old Payen Special tuning C-AHT188 with superior sealing rings.
With modern day technology and NON asbestos l...
Upgraded rocker cover gasket made in silicon, cut outs for 11 stud head and ideal when rocker cover is removed on a regular basis.
Rarely you may require longer rocker cover bolts when fitting this so use CAM6823.
Hi spec all new alloy 5 port gas flowed head. Outright sale to save you the risk of losing £240 on exchange schemes where old heads are traded in and where faults are found, especially by some companies.
Speak to York branch for all modifica...
Modern high lift, short duration camshafts have posed quite a few problems for the general public in recent years. Widely available performance valve springs were outdated overnight, as it became necessary to reduce spring crush. This, in turn, cause...
If you want performance then you know you have to get as much air into the cylinder as possible. The bigger the valves the more this is possible. The standard 1275 mini and Sprite motor has only 1.3" intake valves, the standard Cooper "S" has 1.41" i...
Stud to hold the clutch case to the engine and gearbox, 3 of required. 5/16"UNC thread for alloy fitment for gearbox with UNF thread the other end for the nuts. These are 1.5"long.
The 6 longer ones are 22A152.
These st...
1.220" (31mm) dia x 3.57 exhaust valve.
Our race valves are produced in EN214N steel and are stellite tipped and use the later narrow, single collet groove and current valve head shapes.These valves are plasma heat treated to eradicate wear ...
Genuine Mini Spares valve stem oil seal manufactured with original Dupont Viton, as fitted to the twin points engines, are the best material and seal you can use and although expensive are the best to date in stopping the engine smoking.
Man...
Set of strong lightweight titanium top caps to suit our valve springs C-AEA526/527 hard for single collet competition valves. Sold as a set of 8.
New competition valve cotter, these are precision CNC machined from 4340 and heat treated to a better spec than EN24T and claimed to be stronger in fatigue life.
These locate better in the valves and easier to control spring heights.
30.5mm(1.2") exhaust valve seat for the 2016 on 8 port from Race head number 02-040 and road head number 01-018-now fitted to 5 port race head C-AHT347RACE
Spring seat shims (set of 4), 0.020" thick (0.5mm).
Spacer shims to increase valve seat pressure and overall spring rate.
These were also used on all the 8 port head valve seats to prtect the alloy seats from wear. (8 port now C-AHT...
ARP Head stud kit that compromises of;
4 x Long Head Studs
7 x Short Head Studs (Disregard 2 if you're using a 9 stud application)
11 x Multipoint ARP nuts
11 x Heavy Duty Washers
4 x Rocker post studs <...
Mini Spares best quality complete gasket and seal kit for engine block and gearbox,for all common engine types and sizes.
Also comes complete with Mini Spares Evolution clutch oil seal 13H2934MS, differential oil seals...
3 YEAR GUARANTEE-UK made.Large impeller higher capacity water pump with top quality die cast body . Mini Spares procured product as the original superb Rover Airtex tooling has been scrapped.
Fitted with a PPS, glass filled plastic impeller...
New competition valve cotter, these are precision CNC machined from 4340 and heat treated to a better spec than EN24T and claimed to be stronger in fatigue life.
These locate better in the valves and easier to control spring heights.
Chrome fittings for rocker covers. Kit includes 2 of, rubber seals, chrome washers and spacers.1 kit required per engine.
these are the best quality chrome parts we could find in the market
Upgraded rocker cover gasket made in silicon, cut outs for 11 stud head and ideal when rocker cover is removed on a regular basis.
Rarely you may require longer rocker cover bolts when fitting this so use CAM6823.
Originally developed by Rover to cut down on warranty hourly costs on powertrain warranty repairs, by their main dealers.-Labour time allowed at Rover dealers for fitting this seal was 3.4 hours labour rate.
This is a special rigid seal and ...
998cc flat top 3 ring circlip type piston set as fitted to early A plus to replace 4 ring set type. Gave 10.3 to1 CR and is a good alternative to use on any 998 with circlip type pistons. Replaced 4 ring(3 ring and scraper) P20754 from Hepolite 1980o...
3 layer steel head gasket especially suitable for full race engines up to 73.5mm
bore where it has larger bore holes and considered the ultimate head gasket.
Especially recommended for 8 port heads as it has no fire/compression ring...
Complete stud, nut and washer kit for the cylinder head ancillaries. Kit contains parts to retain the following:
Inlet/Exhaust manifold to head, studs/nuts/washers
Thermostat housing (no sandwich plate) studs/nuts/washers
H...
Minispares own stainless steel Thermostat housing stud kit for the single tier type thermostat housing.Quantity required one kit per car
Water pump fitting kit for models without bypass facility, includes new bolts, washers and superseal gasket.
Price per rod-1275cc larger 6.35mm diameter push rod. Sold per single rod and 8 required per engine.
The larger diameter improves push rod rigidity as much as possible
without having to modify the block/head push rod ports. Thi...
NON GENUINE for standard use only. These are the only type available at the moment and not as accurate as the original Rover product. The genuine factory pushrod was a very good product and does not need routine replacement. The strength and size of ...
Mini Spares cam follower with original convex bottom Radii as used by BMC/Rover and made by Clanceys but less the oil hole. Using Clancey drawings and to our design for better cam performance and lift we have made the push rod recess deeper for stabi...
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