The AVO Up-Pipe incorporates a flex-joint similar to the OEM part, ensuring a tight fit and relieving stress on other components. This high quality product also comes with mounting studs. Your stock uppipe a fairly restrictive catalytic converter. The AVO uppipe deletes the catalytic converter, which makes it legal only for off-road and race use only. Removing the catalytic converter here still leaves two cats in place within your downpipe. Removing this cat decreases spool time and increases performance! This Up-Pipe fits VF22 to 34 and TD04/5 3 bolt flange Turbos.