If sound doesn't make a difference!! Sparks is the best pipe so far for a raptor. Best power ive ever ridden on a raptor ive had yoshi, lrd, white bros, modified stock, lte and the best one ive ridden was sparks!!!! loud as he!!!!!! and shiney too.

Lte tends to break easy for MX or bard jumps!
White bros has bad top end but alright low end i like it personally for low end
Sparks is so great low end if jetted right and extremely great for top end but personally i would choose this pipe over Yoshimura any day of the week.. sure yoshi is real nice.. i mean the welds on it are absolutley perfect. it would probably never break at all under the extreme riding conditions but for the money and proformance Sparks is sooo much better!!!!!!!