If your only going to boost 10 psi, the TiAL 50 mm is really more than you'll need. But if it holds boost and doesnt leak why do you need that sound??? Use a stock 1G DSM or the stock EVO MR bov, it sounds just like a Greddy. Turbosmart makes a good BOV. You should look for the performance of the part, what sound it makes should be irrelavent. Or are you trying to scream" I'm boosting"?