These high voltage coil packs will supply a stronger spark which will allow you to run a larger gap that will improve fuel economy, drivability, and HP capability. Not an earth shattering difference but a small gain. Definitely well worth the upgrade if you're replacing your coils.

Limited lifetime warranty. 

Torque spec: 25 inch pounds

No returns on electrical items.

Sold in a set of 3.

These fit GM 3800 W-Body and H-Body cars including L67, L36, L32, and L26.