Performance Valves

We have the Miata Performance products you need. Scroll down to see some of our items. Just remember, if you don't see it, please give us a call or send an e-mail. Not all items can be listed on the web site, and BEGi specializes in custom pieces. 

The Tial Wastegate assemblies set a new level of design performance. They were created as a direct result of true motorsports development and testing. All Tial wastegates are CNC machined Billet aluminum and feature corrosion resistant components. These wastegates provide maximum control and a wide dynamic flow capacity. The actuator spring also gives consistent pressure at elevated temperatures.

The by-pass valve, blow-off valve, anti-surge valve are all intended for the same purpose; that of suppressing a funny and obnoxious chirping noise made by turbos when lifting off the throttle.  The noise is technically called “surge.” The “blow-off” valve has slowly acquired the implication that it vents to the atmosphere, while the other two names have leaned toward implying the air is vented back into the system in front of the turbo.  The difference is that the blow-off replaces the real surge noise with an equally obnoxious whooshing blast noise made when the vented air hits the atmosphere.   The “anti-surge” valve, with the air ducted back into the system is almost completely quiet, and when heard, amounts to only a gentle “sigh.”  This is the reason our systems feature the anti-surge valve.  It is distinctly more civilized.

The Tial Wastegate assemblies set a new level of design performance. They were created as a direct result of true motorsports development and testing. All Tial BOV's are CNC machined Billet aluminum and feature corrosion resistant components. For use on turbo-charged and super-charged applications. It features a large 1.98 in (50.5mm) valve; we believe this is the largest valve available with the highest flow capacity. The V-Band design aluminum mounting clamp gives a very clean and unique appearance.  The valve seal utilizes a Viton O-ring that is clamped in place to prevent the possibility of sticking to the seat and pulling out. The valve stem and guide are Teflon-lubricated, hard anodize-coated for wear resistance. Avaialbe in red, black, silver, purple and blue.