Gear and Product Reviews

True-Dual Exhaust by Full Sac Performance

Written by  February 28, 2007

I’m a tight-ass. Yep that’s right. Since I am not made of money, bargains are a friend of mine. Don’t get me wrong—I didn’t say “cheap.” A bargain to me is something well made, of high quality at a great price. This brings me to my scooter. If you have a familiarity with Harley-Davidson bikes you know how much the motor company liked to have crossovers on their exhaust system. My old Fat Boy had a crossover in the stock head pipes that I wasn’t fond of. For a couple hundred bucks a set of drag pipes fixed that. On my bagger, the rear jug pipe makes a straight shot to a junction in the front jug pipe. Just a couple inches from the cylinder, the pipe has a Y junction and makes an almost 180-degree bend to send some exhaust gas down the left pipe. It doesn’t take a rocket scientist to figure out that most of the exhaust from the rear cylinder is going to choose the straight path rather than the big bent path. Most of the exhaust ends up going down the right side of the bike. Don’t believe me? Check out the exhaust flow on a bagger at the mufflers on a cold day. You’ll see much more vapor out of the right side exhaust.

No matter how good your mufflers are, this set up just doesn’t sound right. After doing a little research and talking to friends, a true-dual setup (a separate pipe for each cylinder) seemed the way to go. I started shopping for a true-dual exhaust system. What I found gave my wallet a 9.3 pucker factor. The prices I found started out right at $400 for a set of head pipes to over $800 for some systems complete with mufflers. If I spent that kind of green on pipes Stephanie would be placing my laundry on the front porch.

Just about the time I had given up on getting the sound I wanted, I stumbled onto a bargain. Fullsac Performance has a bargain. How about a kit that reuses almost all of your stock exhaust yet gives you a TRUE dual exhaust for $179? You better believe I was impressed. Not only was I getting the sound I wanted but also could expect a 2-3 horsepower gain to boot. Remember above I mentioned one of my requirements for a bargain was high quality? The kit’s pipes are 16 gauge and are 1500-degree ceramic coated. I also mentioned well made above. The kit goes on EXACTLY as advertised. I am not the fastest wrench in the land by any means, but I still managed to complete the installation well within the 1-2 hour advertised time frame. I believe this was largely due to the very clear and complete illustrated instructions.

I am not going to go through the instructions step by step, but I will give you the condensed version. First, pull all your heat shields except on the front cylinder head pipe. Next spray ALL nuts bolts and connections with WD 40. Continue by pulling off your mufflers and all the left side exhaust. Take off the right side exhaust except for the front cylinder head pipe. Install the pieces in the kit, put everything back together, and wipe down all your pipes and shields. (The last thing you need is to burn a greasy fingerprint into your heat shields.) Finally the last step, fire up your bike and sit back awestruck at how much better it sounds.

I kid you not; this kit went on without a hitch. Check out the pictures below. They aren’t as good as the pictures on the instruction sheet but you will get an idea at how easy this install really is. The kit even includes a mandrel to correct any out of round condition in your stock pipe connections and a replacement exhaust gasket for the rear cylinder. Fullsac also offers re-cored stock mufflers to give you the sound and performance you want. Their parts are developed through a combination of dyno testing and real-life on- the-pavement testing. If you want a product that delivers what it promises at a price that is beyond reasonable, all you need to do is check them out at

See ya next time.

By Loney Wilcoxson