Mahle MS Piston Set SBC 397ci 4.040in Bore 3.875in Stroke 6.0in Rod .927 Pin -5cc 11.5 CR Set of 8 930200840 Filters GSC P-D 4G63T EVO 7-9

GSC P-D 4G63T EVO 7-9 Stage 1 Beehive Valve Springs (Use factory retainers and spring seats)

Perrin 08+ STi FMIC Red Boost Tubes w/ Black Silicone

Torque Solution Billet Battery Tie Down: Subaru WRX/STi/Legacy/Forester/Outback Red

There are certain areas where a piston machined from solid is marginally better than a forging but the strength benefits of a forging far outweigh any benefits of a fully machined piston

Mahle MS Piston Set SBC 397ci 4.040in Bore 3.875in Stroke 6.0in Rod .927 Pin -5cc 11.5 CR Set of 8 930200840 Filters GSC P-D 4G63T EVO 7-9Mahle MS Piston Set SBC 397ci 4. 040in Bore 3. 875in Stroke 6. 0in Rod . 927 Pin 5cc 11. 5 CR Set of 8 930200840