DIRT PRO # 3011 ~ 3.0"-inch / inlet & outlet DIRT PRO # 3511 ~ 3.5"-inch / inlet & outlet

Dirt Pro Race Mufflers #3011 & #3511 used by Bomber,Super Bomber,Hobby,Modified Hobby and Street Stock classes. The 3011 & 3511 has #250 size louvers in the same Right Hand Rotation Pattern as the " 357 " for greater " FLOW " which increases " HORSEPOWER "

Dirt Pro Race Mufflers are 100% Aluminized 16 Gauge Steel,Welded Construction for Durabily & Strength. The Core is air chambered to reduce noise to meet track requirements. Dirt Pro # 3011 & Dirt Pro # 3511