aFe MACH Force-Xp 3 IN to 3-1/2 IN 409 Stainless Steel Cat-Back Exhaust w/ Black Tip (49-43073-B) 3101 SM-Series crankshaft main bearings feature

SM-Series crankshaft main bearings feature a traditional steel-backing

It features a 303 stainless steel stick and 30 percent reduction in throw for quicker more positive shifts

Reduce turbulence-induced lift

melted bumpers and so on

Along with that impressive intake tube design

aFe MACH Force-Xp 3 IN to 3-1/2 IN 409 Stainless Steel Cat-Back Exhaust w/ Black Tip (49-43073-B) 3101 SM-Series crankshaft main bearings featureMach Force XP 409 SS Cat Back Exhaust System with Single Side Exit (49 43073 B) by aFe. Exhaust System Type: Cat Back. Exhaust Tubing Material: 409 SS. Main Tubing Diameter: 3" to 3. 5". Exhaust System Sound: Aggressive Loud. Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Mach Force XP Cat Back Exhaust System. aFe dyno tests every system for maximum gains, and constructs