I ordered the speedwerx can only to cancel the order and purchase the d&d barker can because I wanted alittle rumble, and I saw the turbo dynamics on you-tube and it is less noisy then the stock! My dealer said speedwerx does not produce varyuch noise either so I switched my order. I put on the barker can the other night and instantly had a smile from ear to ear! Not to loud and is nice and crisp. Huge drop in weight and nice supposed to get nice gains in h.p and boost. Now that I got it sounding good the sled has so much power the other gains will be a bonus, and I also cancelled my hi-hacker order because I honestly am so impressed with this thing I don't feel the need for more h.p until I find something that absolutely is the best. Sorry I got off the subject ah bit!!!