STM Stainless Cat-Back Exhaust for 1G AWD DSM Magnus AMA Motocross and Supercross to

AMA Motocross and Supercross to design and manufacture the highest technology pistons available

Commonly used to rebuild Evo 4/5/6/7/8

Includes all 4 cams and 24 springs

AN Size: Part Number: -4AN 21904 -6AN 21906 -8AN 21908 -10AN 21910 -12AN 21912 -16AN 21916 -20AN 21920

and are unmatched in quality

STM Stainless Cat-Back Exhaust for 1G AWD DSM Magnus AMA Motocross and Supercross toThe STM full 3" stainless steel cat back exhaust for 1G AWD DSM is made in house at STM from 3" mandrel bent tube and tig welded flanges with an Ultra Quiet resonator for the perfect mix of sound and performance. Fits AWD models only and fits both 1GA and 1GB bumpers. The cat back exhaust utilizes all factory hangers and weighs in at 21. 20 pounds with hardware. Fits with the STM 1G DSM High Flow Cat or any stock location 3" cat testpipe. Pictured