Loudvalves.com

Here at Loudvalves we sell Boost actuated exhaust cutout valves and turbo accessories.

The boost activated series are fully opened at about 6psi. you can use a boost controller to open at higher boost pressures if desired

Common Question: Do they valves leak?
they may have a slight exhaust leak at idle. the vacuum your car makes helps to "suck" the valve closed, nevertheless they may still have a slight exhaust leak, some customers say its not noticible, some say it is.