a friend of mine had an ebay special mani his daily sr running 16 psi on a S15 turbo making a lil under 300 at the wheels. He drove the car back and forth from N.C. and never had an issue. I am currently running their (XS power) dual outlet exhaust on my s14 KA-T with no issues. Sounds good and for the price (cheaper than a used Apexi or HKS by far) It's a good deal. Personally I'd say just brace any mani you get if its not already.