A jrsc won't run more than 10psi efficiently without A TON of work, making it impractical compared to turbo for higher power levels. I would not buy one for the sound. I the only time I can barely hear mine is at high rpm's at WOT in 3rd gear +. Then again thats prolly bc my loud ass exhauts drowns it out... Don't expect it to scream like an eaton Cobra