Vibrant Race Muffler, 4.5" Inside diameter x 5" Over All Length - 17985 Methanol If you are using aftermarket

If you are using aftermarket or other unusual setups please contact us prior to placing your order to make sure you receive injectors that fit properly

83a durometer bushings

we updated to a bar-and-plate core construction

Re-defining style

Get the ultimate shift upgrade for your Focus ST or RS

Vibrant Race Muffler, 4.5" Inside diameter x 5" Over All Length - 17985 Methanol If you are using aftermarketMuffler OD: 5. 125 Vibrant Performance stainless steel race mufflers are densely packed with our premium multi layered sound absorption materials, TIG welded for optimum durability, and manufactured from 304 stainless steel for optimum durability and corrosion resistance. Vibrant Performance race mufflers are very lightweight, compact, and are designed to comply with muffler requirement rules at race tracks throughout North America. They are available