£1,876.50 exc vat
£2,251.80 inc vat
Out of stock
Speak to York branch for all modifications required to fit this head as it is not a straight swap. The use of large valve seats and spacing means that the rocker cover might need modifying at the back to clear rockers..
A machined rocker cover FP24 is available for clearance problems but valves are in original centralised positions so usually no problem.
Manifold studs with UNC thread for alloy type heads only are included (6 of 53K547)
Mini Spares own 5 port std type alloy head based on the 12G1805 "S"940 casting with fully modified porting for fast road /rally use.
Combustion chambers are original 21.3 to 21.5cc
Beryllium valve seats with 35.7 inlets with 29.5 mm exhaust EN214N race quality valves, bronze guides with safety clips,ported and flowed to performance specification.-Weight approx 5.7kg
See C-AHT347RACE for full Race head.
For any technical info ring NEIL BOOTH at Mini Spares North.
Machined to use our C-AEA526 spring height valve springs with our shims underneath.
Use GEG300,TAM1521(BK450) or C-AHT189 cometic head gaskets only
Advantages are weight and better cooling on a brand new head as old castings are becoming poor for reliability when modifying.
All heads are hipped and heat treated (annealed) from the foundry and pressure tested before machining and again after they are assembled.
Ring Mini Spares North for technical information and availability of any special requirements if we can be of assistance.
In the 60's the SPEEDWELL 850cc head had 1.1" x1" std valve sizes, 998/1100cc had 1.22" to 1.25" x1" and the race head had 1.32" x1.156" with base cost of £39-10 to £49-10 except race head during it's production,when available.Cast in Italy they had porosity problems with very poorly designed valve guides but were capable of withstanding higher compression ratios in their day by virtue of being alloy. Add inflation from internet sources to the original price they would now cost £1828.42 for an outdated head,but here we are with modern technology and heat treatments creating a head better than most standard modified heads available with valve sizes for 1275/1380cc
Ensure the use of high quality flat washers for head bolt nuts similar to those in kit C-AHT280
Suggested torque setting procedure in workshop manual sequence as follows
1st stage 15lbs/ft
2nd sgage 30lbs/ft
3rd shage 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 type head gaskets.
£1,876.50 exc vat
£2,251.80 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...
Very Hi spec all new alloy 5 port super gas flowing head. Outright sale to save you the risk of losing £240 on exchange schemes where old heads are traded in and where faults can be found, especially by some companies.
The C-AHT347...
Top cap for all A Plus valves with the triple groove collets. Metro from 1984 on and mini 1275 from 1990
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...
1.158" (29.4) dia exhaust valve for 12G940 casting.
Our race valves are produced in EN214N stainless steel and require Manganese/Silicon bronze alloy valve guides. They are stellite tipped and have the triple collet groove and c...
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...
Collet for the 3 groove valve. Sold per half and 2 required per valve.
These cotters go with AHU1897 top cap. On Turbo heads after engine number 102641 were fitted on the inlet only.
All early 850/997/998/1098cc heads u...
New colour, PB104 bronze guides.Although Silicon bronze valve guides were used for their extremely good wear values, they were very hard and not user friendly when fitting. These valve guides are recommended when using all EN21 4N stainless steel val...
1.402" (35.6mm) dia x 3.57" long intake valve.
Our race valves are produced in EN214N steel and are stellite tipped and use the latest triple collet groove and current valve head shapes, plasma heat treated for eradicating unleaded petrol we...
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...
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
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-...
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 <...
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...
Originally fitted to Minifin rocker covers as standard Rover equipment, it will also fit almost every other rocker cover including our FP26 range and Minispares alloy covers. This improved cap has a large grip and an improved lock system...
replacements in stainless steel for the heater tap elbow on the cylinder head.
Quantity required one kit per car
A simple way to dress up that engine compartment while at the same time insuring all the proper hardware is in place. A kit includes 2 each of British made chrome sleeve nuts, spacers and special cup washers, Fits all A & B series engines.
F...
Originally marketed by minispares in the mid 70s so many companies copied them because of their smart looks and ease of fitment they were improved by offsetting the arms to help tighten plus stop the arm falling out when they were straight. These T b...
Payen,stamped BK450, original standard composite reinforced gasket used on all large bore engines by Rover including Metro and MG Turbo and is an exceptionally good gasket.
Asbestos free with copper type sealing rings. Compressed volume is ...
Originally marketed by Minispares in the mid 70s so many companies copied them because of their smart looks and ease of fitment. These have been improved by offsetting the arms to help tighten plus stop the arm falling out when they were straight. Ki...
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...
Payen stamped AF470, Standard composite reinforced gasket used on all large bore engines by Rover is an exceptionally good gasket. Asbestos free with special black sealing ring for the oil feed. Compressed volume is 4cc. This MINI head gasket has in ...
Made of thicker, more pliant material with larger ports than the original gaskets. A must for use on ported heads.
No reason for an oil leak here. For the price, they should be replaced every time the rocker cover is off. Sold singly, 2 required per engine.
We have now sold all the original seals we cleared out from Rover so July 2017 retooled to make a ...
The oil pressure relief valve consists of an aluminum plunger with a heavy spring behind it. Access is through the 15/16" domed cap nut beside the dizzy. Once this nut is removed the spring will be visible. The plunger is beneath the spring and will ...
Adjustable engine upper stabiliser rod.
Copy of ERA 1020 adjustable rod as fitted to the ERA mini turbo for clearance reasons. This adjustable rod takes the standard rubber bushes or equivalent and is a useful means of pushing the top of the...
The original stabiliser kit with cone shaped spacers to strengthen up the rubber bushes against engine movement. Kit includes 4 cone plastic shaped inserts and 4 bushes. The cone shaped inserts push the rubber out in the middle of the engine steady b...
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