Since we're running the Magnuson blower, we thought this would be a great time to lower the static compression of the LS3. From the factory it comes in at 10.7:1, so we contacted Ross Racing Pistons for some dished slugs. Their pistons are forged from 2618 billet bar stock and hardened to a T61 condition to better resist fatigue and keep its shape under extreme pressure and rpm. To get us near our 9.5:1 compression target, these pistons have a volume of -17.6cc. They also have a compression height of 1.112 and utilize a 0.927 pin.