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      04-28-2013, 08:24 PM   #236
Subw00er
Bates '08 Interlagos Launch
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Drives: 440i xGC, ZL1, JCW
Join Date: Nov 2005
Location: NY

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I think I posted the dyno stuff in here?! Its a really old thread. I think you actually lose a bit of low end grunt when opening up an exhaust but gain in the higher rpm. I had plans to close them at the line and then have them auto open at just the right rpm, but I never got around to it.

The JEGS valves did eventually fail too (lasted 2x longer than race ready), but JEGS did replace them for free - its nice to deal with a company that stands behind their products.

The exhaust is still going strong and I LOVE it. Its the best mod I've done to a car, ever.
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Custom Exhaust Project: Bates Valvetronic exhaust: http://www.m3post.com/forums/showthread.php?t=253661 -- Exhaust Mod pics in here: http://www.flickr.com/photos/40236795@N03/
DON'T BUY Race Ready Performance electronic cutout valves. Here's why: http://www.m3post.com/forums/showthr...40#post9589740
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