£135.00 exc vat
£162.00 inc vat
In stock
Ensure posts are equally tightened down to eliminate stress fractures on shaft.
Using 1.5 ratio high lift rockers has almost become the standard amongst engine tuners and these are more effective at high revs than roller type which are also very expensive.
Mini Spares 1.5 ratio forged rockers set are a direct replacement for the standard versions and will give significant gains on 1275cc units. Complete kit includes eight rockers, adjusting screws, four steel pedestals and heavy duty rocker shaft. Tighten posts evenly to stop potential fracturing of rocker shaft.
The most often talked about "high lift rockers" are the latest design "roller" type but the main reason "high lift" rockers were designed was to allow easy bolt on performance without having to disassemble the engine to change camshafts. This performance improvement is achieved with or without the "roller" added option. The standard "high lift" rockers provide a ratio of 1.5 vs the stock 1.25. (The "roller tip" type also have a 1.5 ratio).
Valve clearances should be opened up by .003" over recommended settings, although up to .005" can prove beneficial with certain combinations. Using the 1.5 ratio not only increases the maximum lift, but it also means that the valve is open approximately 20% more at any given point- although opening and closing periods remain the same. This vastly improves volumetric efficiency and therefore power output.
£135.00 exc vat
£162.00 inc vat
In stockRecommended usage 1 x C-AHT436 to fit one mini.
Goes on both ends of the rocker shaft to keep tension on the #1 & #8 rockers.
original rocker shaft spring (3) between rockers on every A series engine
Mini Spares spacer kit re-designed in 2005 for correcting rocker alignment.
This kit has been produced to help rocker pad and valve stem alignment plus reducing friction. The standard springs can be replaced with this special kit of 3 spacer...
This kit gives the same power as the C-STN21 but uses forged 1.5 rockers as opposed to alloy roller tipped type and has road spec valves rather than race type. This makes the kit a little cheaper
This is more or less exactly the same in terms of performance as the C-STN20
performance kit but uses 1.5 forged rockers instead of roller tipped alloy
rockers and the cylinder head uses top grade road type valves. A gtrue ain of 20...
Genuine Mini Spares upgraded UK made EN8 screws, specially heat treated in correct places as per original drawings, sold individually without nuts.
Nuts are sold individually as NT605061.
Used on our 1.5 forged and roll...
Direct replacement rocker shaft. Fits all except full needle roller types. Far superior to the stock item! ENSURE YOU ALWAYS TIGHTEN DOWN ALL POSTS EQUALLY to eliminate stress fractures on shaft.
Our special "heavy duty" shaft has ...
Genuine Mini Spares part- 1.5 Hi Lift Roller-tip rocker assembly for 1275cc with gold anodised steel posts.
These extra high-spec alloy Purple rockers were introduced in 1998 to give push rods a better clearance on A Plus heads.
...
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...
This kit of head studs is the best available for road and lightly tuned engines. See the C-AHT280 set for highly tuned engines.
The material spec is alloy steel heat treated to 75 tensile tons per square foot minimum and finish...
Approx 23.5cc combustion chambers for use with dished pistons. This specification of cylinder head is the only modified version for the small-bore based engines Mini Spares supply as it is judged to be the only one worth up-grading to. Based on used ...
35.6 x 29.3mm valves in chrome stem with cast iron valve guides.
MPI specification of cylinder head, based on used core castings, modified in true Road sport style to maximise on-road performance for those wanting maximised drive-ability w...
35.6 x 29.3mm valves in chrome stem with cast iron valve guides.
By pass hose tube and heater outlet open. This specification of cylinder head, based on used core casting, is modified in true Road sport style to maximise on-road performance ...
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-...
35.7 x 31mm race valves in plasma-nitrided EN214N s/steel with manganese bronze valve guides. Nominal 21.4cc with by pass and heater take off holes open.
This specification of cylinder head, based on used core castings, is modified to curre...
35.7 x 29.5mm race valves in plasma-nitrided EN214N s/steel with manganese bronze valve guides, Nominal 21.4cc with by pass hose and heater take off holes open. This specification of cylinder head, based on used core castings, is modified to current...
A true Cooper S engine has 10 studs and one specially designed bolt. The ARP version of the stud is a 12 point design that matches the head stud kits (which come in either 9 or 11 stud.) Best of all, the ARP bolt cost less than the standard item!
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...
Fitting kit comprising of studs, nuts, plain washers, spring washers and a gasket
This kit of head studs is the best available for road and lightly tuned engines. See the C-AHT280 set for highly tuned engines.
The material spec is alloy steel heat treated to 75 tensile tons per square foot minimum and finish...
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 <...
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.
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.
Unlike polished covers, these powder coated aluminum valve covers don't get that dingy look; simply wipe them and they're clean. (Fins and Mini Spares logo remain cast aluminum finish) And they're made to clear our hi-lift rockers. Available in ...
Unlike polished covers, these red powder coated aluminum valve covers don't get that dingy look; simply wipe them and they're clean. (Fins and Mini Spares logo remain cast aluminum finish) And they're made to clear our hi-lift rockers. Available...
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