SPELAB Exhaust Header for 265-400 C.i. with Standard Or Vortec Heads Including D-port ZZ-4 Style Heads (not LT-1)
SPELAB Exhaust Header for 265-400 C.i. with Standard Or Vortec Heads Including D-port ZZ-4 Style Heads (not LT-1) Replacing or upgrading your exhaust header is necessary for both engine performance an…
TL;DR: SPELAB Exhaust Header for 265-400 C.i. with Standard Or Vortec Heads Including D-port ZZ-4 Style Heads (not LT-1) Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust s…