KB305030 Performance, 1340cc Evo B.T. pop-up piston kit. +.030"

Upgrade your Evolution engine with this KB Performance 1340cc Evo Big Twin pop-up piston kit. Sold as a set in a +.030" oversize, these pistons utilize a pop-up dome to achieve a 9.5:1 compression ratio, providing a noticeable increase in performance. They are made from T6 heat-treated 390 hypereutectic aluminum with a 16% silicone content, ensuring they can be run with tight clearances for a quiet and long-lasting engine. These fit 1984 to 1999 1340cc Evolution Big Twin models. It is critical to ensure the top compression ring is gapped with the required additional clearance per the instructions. This kit provides a perfect balance of increased power and smooth, quiet operation for your Evo.