40 Series Performance Muffler Brake Kits A thicker core would diminish

A thicker core would diminish airflow and sacrifice normal engine cooling which would be potentially detrimental to the long term health of the engine

they give your wheels the desired offset needed to create the stance or look you desire

Exhaust System - Outlaw - Cat-Back - 3 in Tailpipe - 3

the intake tube comes complete with baffling and a small Helmholtz chamber to reduce unwanted sound

Muffler - 40 Delta - 2 in Offset Inlet - 2 in Center Outlet - 13 x 9

40 Series Performance Muffler Brake Kits A thicker core would diminishMuffler Original 40 Series Dual 2. 5 in Inlets Dual 2. 5 in Outlets 13 x 9. 5 x 4 in Oval Body 19 in Long Steel Black Paint Universal Each