Stainless Steel Tip 3.5 in OD 3in Inlet 10in L Lug Bolts internal cross sectional area is

internal cross sectional area is increased by approximately 78 percent

DINANTRONICS Sport Maximum Gains (N38): Up to 20 HP

Exhaust System - American Thunder - Header-Back - 3 in Diameter - Dual Rear Exit - Steel - Aluminized - GM F-Body 1967-69 - Kit

These wheels are built to Dinan offsets and sizes to accommodate substantially larger tires without any rubbing or modification of the wheel well

5 in Tips - Stainless - Natural - GM LS-Series - GM F-Body 1998-2002 - Kit

Stainless Steel Tip 3.5 in OD 3in Inlet 10in L Lug Bolts internal cross sectional area isExhaust Tip Clamp On 3 in Inlet 3. 5 in Round Outlet 10 in Length Single Wall Rolled Edge Angled Cut Stainless Black Powder Coat Each