It's pretty easy to make a make a catless downpipe that makes power.  It's much harder to make a downpipe with a catalytic converter yet...

TurboXS RFL Catback Exhaust for the Cobalt SS TC is just that "Really Fuckin' Loud".  As with anything we put our "RFL" tag on, this part...

Allows you to mount a TurboXS BOV-H or BOV-H-RFL to an intercooler pipe that is flanged for an HKS Super Sequential Valve. Blow Off Valve...

TurboXS RFL Catback Exhaust for the Cobalt SS TC is just that "Really Fuckin' Loud".  As with anything we put our "RFL" tag on, this part...

With new and improved styling, the BOV-H-RFL remains true to it's roots - it's still really f'n loud! Like all our valves, the RFL...

With new and improved styling, the WS02-XS-RFL remains true to it's roots - it's still really f'n loud! Like all our valves, the RFL...

Not too loud and not too quiet, the WS02-XS-HYB from TurboXS is the valve for you if you want an upgraded Blow Off Valve that you can...

Not too loud and not too quiet, the W15-XS-HYB from TurboXS is the valve for you if you want an upgraded Blow Off Valve that you can hear...

TurboXS releases the first Hybrid Blow Off Valve designed specifically tuned for the Mazdaspeed 3 & 6. The valve features an...

The Genesis 2.0T Blow Off Valve Kit is a complete bolt on valve. Which allows you remove the factory bypass valve and replace it with our...

The JUKE-XS-RFL is the blow off valve of choice for the Nissan Juke owner looking for the loudest blow off valve available on the...

The TurboXS WRX Hybrid Blow Off Valve is a best Hybrid Valve on the market for the new WRX. Featuring Vent to atmosphere and Hybrid...