STM-Spec Manley Custom 11.5:1 Pistons for 4G63 Evo 4-9 Hoosier Machined in the USA and

Machined in the USA and finished with a stealth

Eliminate sway bar preload via the adjustable body providing up to 25mm center to center length adjustment

and most importantly protect your car from the overheating

Inline design works well as a stand-alone or as a booster pump

Pictured on an Evo 8 with FD RX7 wheels

STM-Spec Manley Custom 11.5:1 Pistons for 4G63 Evo 4-9 Hoosier Machined in the USA andThe STM Spec Manley Evo IV IX Custom 11. 5: 1 Pistons for 2. 0L 4G63 are now available! These are the same gas ported pistons we have been testing in our STM Race Engines and easily trapping 165+ MPH in the 1 4! The STM Spec Pistons are only available in 85. 5mm bore and come with coated skirts, rings and wrist pins. If you have questions about your build, feel free to give us a call and we will get you on the right path to your goals. STM Spec