When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
So.. a set of long 2x2 drags like the Super Trapp brand hurt my horsepower/touque even with torque cones etc?..
Not so much HP, but torque, yes! Take a look at any multi-cylinder vehicle and they all have a system that joins the pipes together. That is not to cut the cost of making the exhaust system, but to get the benefits of inter-action between the cylinders. The classic is a 3-cylinder 2-stroke, which with a 3-into-1 system can produce seriously more torque than any other configuration.
Our V-twins are not as good, but they still benefit from siamesing the pipes. Where they join is important and if both pipes are the same length the benefit will be even greater. For touring bikes there are a couple of brands that achieve that, but it involves some serious gymnastics with the rear pipe.
Buells all used equal length pipes and were able to use much higher CR, wilder cam profiles and get far more performance, HP and TQ, than a Sportster ever will.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
