I was wondering what is the loudest slip on pipe for a 2004 yfz 450 with a gyt-r head pipe? There are DG xcellerator slip-ons on ebay for 150 shipped. Are they loud?

 

Why? Loud doesn't equate to power. It CAN get riding areas closed down. I have even been to a few closed courses that were having problems with noise/neighbors and fighting to stay open. I have a LEXX that makes close to the power of my old HMF and is a whopping 10dB quieter than the HMF(both with quiet cores installed.)

 

2 Brothers is one of the loudest pipes at 104db. Gives great power gains too.

 

Try Bill's pipes. I run one on my 87 lt500r and you could definitely pick me out of a crowd.
Some times to loud. LOL