RB Racing LSR Exhaust Systems simply work. This isn't rocket science. This isn't hype. No wazoo megaphones with airfoils, no aluminum butt plugs or stupid disc type mufflers. Good, competition-proven designs that time after time outperform other pipes. The reason is simple: We use cnc machined turbo venturis; we use smooth high flowing collectors; we use proper tube diameters and lengths for the application; and we make a variety of designs to best suit the intended application. One thing we don't do is make one design, declare it will solve all your problems and promote the crap out of it...because the exhaust is but one part of the equation and there are no simple answers. Picture above is a set of LSR Pro Stock Nitro Duals 00-1078SA for a 113/132" ORCA motor.

LSR Pro Stock Pipes for S&S "SA" and B2 heads

Two Inch primaries into a hand made 12 degree merge collector. At 7000 rpm it will sound like nothing you've ever heard before...they stop people in their tracks. Silver ceramic coated with integral turbo venturis and S&S pattern four bolt flanges. The two button head screws on the rear pipe are to hold a chromed heat shield. Beautifully tig-welded, these are a work of art.

LSR 2-1 Pro Stock on 113" ORCA. Polished Silver Ceramic finish.

"SA" Flanges: Early SA(16-0239)/Late B2(55-6021)

Look at the stock oem Harley Davidson flange on the left and the four bolt S&S SA Cycle flange on the right. Guess which exhaust port has the greatest potential. Nothing fits the huge port SA heads except the three lines of exhausts that we offer. Two versions of these SA heads exist and they have different bolt patterns. The latest version is the B2 which has 2.200" inlets and 1.800" exhaust valves. RB Racing makes exhausts and has turbo venturis and four bolt flanges for both.

Take a tour of the three designs in thirteen variations we offer for the ORCAS: LSR 2-1, LSR 2-1 Pro Stock, and LSR Nitro Duals.