I know the stock seems to be the best, but my frined is looking to get a BOV come hell or high water in his 94 turbo. I hear the HKS sequential BOV is teh b3stst, but Im no where near the expert when it comes to MR2's OR turbos. He currently has a Turbo XS BOV and said he HATES it. Made his car run like crap, but refuses to put the stock piece back on. Any help here?