998cc dished circlip type piston with 4 rings. Compression range of 8.3 to 9:1 depending on block and head but for best performance use later 3 ring flat top piston ADU3490-60. If you want to go faster, keeping that 998cc block, Big bor...

Owing to non-availability of other good quality 998cc pistons, these Mini Spares Evolution design pistons from a renowned high-performance piston manufacturer are flat top with drilled oil drain-back holes rather than slots behind the rings for maxim...

Available at the moment but they sporadically become unavailable. Mini Spares have also had a batch of plus 60s specially commissioned to us for Grass trackers and racers. sold individually with rings and pin complete.

Ringsets are availabl...

Mahle was Vandervell bearings 1.064" 27.05mm wide mains for the late 850cc plus all 997/998/1100cc at 20 thou oversize. Early 850 mains were VP592 and 1.185" 30.10mm wide...Quantity required-1 set.

Replace with new camshaft,it's almost too easy to overlook during a rebuild. Camshaft bearings are pressed into the block and thus are usually done by a machine shop. You would not rebuild an engine without replacing the rod bearings, so why not the ...

Lightened cam gear duplex timing gear and chain set. Not recommended for race/rally applications. approx 69-70g 9% lighter

General: Camshaft Drive Systems


For highly tuned engines always use steel duplex as cast is nowhere as st...

Plastic tensioner pad to take up the slack in single row timing chains on A plus engines that wears and should be replaced nearly every time you have the timing cover off. From engine numbers 99H791/10H791 AND ALL A+. Fitted to 998/1100cc from 1979 a...

Mini Spares own Universal gasket set.

This engine block gasket set fits all manual blocks and include rubber tappet chest covers and bolt seals, also including A plus and Pre A Plus timing gear and cover gaskets. For the equivalent gasket se...

3 Bolt hole fixing pump for A plus 998cc engines. This has a spade type drive spindle to fit the slot in the camshafts. This replaced earlier peg type drive which fitted into camshafts with a pin (known as pin drive).

If you drive A-Series cars long enough you will eventually have to replace the water pump bypass hose. These are the best quality available to fit without removing the cylinder head but these fluted rubber hoses have a bad reputation so if possible ...

That tell tale puff of blue smoke when you first start is an indicator of worn guides or seals. Valve guides should be replaced with every valve job.

Sold individually, these are the original quality Cooper S guides for use in any head espec...