Stainless steel smooth 4-1 design with unequal length design for unmistakable boxter engine rumble.
Designed to fit all single scroll subaru OEM turbo chargers.
Superior unequal equal length design will improve turbo response and rumble exhaust tone.
Extra large 39mm 1.535" runners id turbo mating flange.
Extra thick 3/8 flanges hand tig welded to resist warpage and cracking. All necessary gaskets and hardware are included as seen in the picture.
3/8 thick flanges
39mm 1.535" runners
58mm 2.283" id up pipe