Banks Power 06-07 Chevy 6.6L SCLB Monster Exhaust System - SS Single Exhaust w/ Chrome Tip4 in. stainless constant diameter pipes and straight thru muffler improve flow up to 176 percent and lower EGTs, cuts backpressure up to 98 percent, rich authoritative sound. Banks 4 in. heavy duty stainless Monster exhaust system cuts backpressure up to 98 percent and flows up to 176 percent better than stock. The streamlined intermediate pipe(s) and tailpipe are formed of stainless, heavy wall tubing with constant diameter bends to maximize airflow