Legal Mufflers for: * Western States Dwarf Car Association * Bay Area Dwarf Cars * VRA Dwaft Cars These Dwarf Car Mufflers have been designed to fit the dwarf cars without modification of side bars or chassis. All Dwarf Car Mufflers come with a built-in turn down. Dyno and track tested. They meet most all track dB requirements. Extreme Mufflers are manufactured of Aluminized steel and are completely tig / mig welded for durability. These flow-thru mufflers are packed with 100% Stainless Steel to eliminate burnout. * 2" collector use - 3515-2020-8 * 2 1/4" collector use - 3515-2420-8