Drifting requires a good amount of horsepower to be able to smoke those tires around the track. What better way to gain reliable horsepower than to increase bore size?

Darton Sleeves now has a big bore flanged sleeve available. There are two sizes available for the Nissan SR20 block. The first one is supplied at a semi-finished bore size of 86mm with a max bore of 86.5mm.

The big bore sleeve is supplied at a semi-finished bore size of 87mm with a monstrous bore size of 90mm. Both of these sleeves are easily capable of withstanding up to 30 pounds of boost. There is no need to throw away those old blocks just resleeve it with a Darton flanged sleeve. The sleeves are made of the same 130,000psi tensile strength nodular ductile iron used on all our Funny Car and Top Fuel applications.