This piece bolts on under a STOCK heat exchanger. I used it to get air to my front brakes for about a year. I upgraded my heat exchanger and it no longer fits. I bought it off a member on this site. It's well-made and very stout. No modifications/drilling required. Asking $100 plus the ride. It's bulky, so shipping may be in the $60 range, just fyi..... I'll even throw in the brake ducting......