JE Stock Stroke Pistons
Sale Price: $699.00

ARP Head Studs
Sale Price: $135.00

JE Stroker Pistons
Sale Price: $749.00

Brass Turbo upper Oil Return Fitting
Sale Price: $25.00

Twin Turbo 109 Block Headers
Sale Price: $599.00

Valve Cover Black Powder Coat Engraved with Polished Breathers
Sale Price: $335.00

Welcome To GN1Performance!

GN1Performance has an array of accessories for your Buick Grand National. We have been building these cars for over 10 years and know you are getting quality parts that will work...

We specialize in Turbo Upgrades, Intercoolers, Custom Headers, Wastegates, Champion Racing Heads, Transmissions, Converters, Motor Rebuild, Custom Fabrication and fine tune vehicles. It is our business to do it right the first time. If you don't see what you are looking for, we will find it for you!


To start shopping please visit our all new online catalog. You can pay for your purchase using your credit card, PayPal and now Google Checkout!


All parts are for competition or off road use only


Web Specials

Why Buy From GN1Performance?

Warranty Information