1.75" LONG shouldered 1/4" bolt fits original concentric pumps plus some GLP139 and GLP110MS - check that you need a bolt this length as many later pumps require shorter bolts. This can of course be cut down or see [link]BH6...

For the original 1275 turbo Rover pistons. The only piston available now are plus 40 thou oversize in minispares mega range P22357-40 and they use our Mega ring sets C-AJJ3379

3mm OIL RING with compression ring size .0591" (1.5mm)and one piece oil ring .1181" (3mm)on p21253 pistons giving 9.7cr on 1275cc. 40 thou oversize

For performance see steel ring set with 3 piece oil ring as favoured by engine builders[link]...

Low drag 1275 piston standard size 2.780 plus 60 thou oversize (Rings included).

This piston has a possible compression ratio of 10.3:1 as fitted to Cooper RSP 1990. The engine then becomes 1328cc

The best performance 1275 pistons a...

The special washer under the tappet cover bolt.Sold singly 2 required per engine.

See 12A1176 for seal

Lower rubber seal for belt-drive timing gear.

Slot drive pump for 998cc A-Plus engines.

All oil pumps are not created equal! Almost all pumps available today have the same design capacity. The problem is the lack of precise manufacturing. Most factories in their quest for production vol...

Many cam profiles have been tried over the years but the famous old "649" grind is still considered the best overall! It's a 300 degree duration cam with a valve lift of .470 when used with high lift rockers (.4" with stock)! This profile works great...

Needs free flowing exhaust manifold and system, high CR, best with medium to long inlet manifolds. Mid and top end power only. Gives very good results when twin SU’s have to be used. Rev range 3,250-8,000/8,500 dependent on build.

As of J...

The seating in the block that the 12H865 oil pressure release valve sits in, when fitting the end with the slight taper goes into the block first.

Tapped M8 to make removal from the block easy. We recommend that you leave the ol...