Cylinder Heads, Aluminum SI Series, TA Performance, 3.8L V6, Assembled

Buick 3.8L V6 SI-Series Aluminum Cylinder Head Pair by TA Performance

Assembled SI heads retain stock-style compatibility with 46cc chambers and 156/72cc runners.

TA Performance Products SI-Series Stage 1 aluminum cylinder heads are designed as a straightforward upgrade for Buick 3.8L V6 engines. They use 1.940-inch intake and 1.600-inch exhaust valves, 46cc chambers, 156cc intake runners and 72cc exhaust runners. The SI configuration is designed to work with stock-style rockers, intake and exhaust manifolds, and valve covers. Sold as a pair.

• TA Performance Products SI-Series Stage 1 heads • Buick 3.8L V6 application • 46cc combustion chambers • 156cc intake / 72cc exhaust runners • Compatible with stock-style external components • Sold as an assembled pair