Trinity Racing's YFZ450 Exhaust System

Trinity Racing's YFZ450 Exhaust System

The biggest question facing the majority of sport quad owners that are starting to modify their ATVs has to be "Which aftermarket exhaust should I purchase?", and with good reason. There are more companies making exhaust systems than there are tires, hand grips, and well just about any other part found on an ATV. It's usually the first thing upgraded with performance-minded owners, and also one of the most expensive. In our own search for a full system to install on our stock '04 YFZ450, we decided to give Trinity Racing a try, after briefly talking with them about their Stage 4 exhaust.

We received our kit from them in just a few days, and as expected, it was packaged well. After rummaging through the styrofoam peanuts we found all three pieces of the exhaust; the head pipe, a center section, and the silencer. What really caught our eye was the gorgeous chrome finish on the head pipe and center piece. The silencer looks great also with it's aluminum finish and Billet end cap. What's also nice is that the silencer uses a Billet aluminum mounting bracket, which looks great, and sets it apart from other exhaust systems. The whole system weighs in at 7 1/2 pounds; that's a little over 4 pounds saved. The kit also came with 2 main jets (#172, #175) and a #45 pilot jet for our carburetor, which was nice. All mounting hardware was provided, too.

Prior to installing the Stage 4 system, we re-jetted the carburetor with the #172 main jet and the #45 pilot jet, and left the stock needle settings in place for the time being. Even though installing an exhaust system is pretty straight-forward, we feel that the instructions it comes with could be much better (some photos wouldn't hurt!). Nevertheless, we pieced the system together on the YFZ450 starting with the head pipe, then the center section, and finally the silencer. After everything looked right, we tightened all fasteners and were done, in about 10 minutes. Immediately after pressing the start button, we were excited by the new sound emerging from the YFZ450. Gone was the quiet, un-intimidating melody, replaced by a throaty, adrenaline-inducing roar. Although probably not the loudest one we've heard, it's definitely not the quietest, and seems to fall right in the "average" column for aftermarket exhausts in the decibal category.

After letting it warm up for a minute, we hopped on and ripped around, taking note of the power delivery in all RPM ranges. It sure did make an improvement, with a very noticeable gain in the mid-range, but felt great in all areas. It ran flawlessly with our jetting, with no flat spots. The front wheels would now lift off the ground much easier while going through the gears, and the sound makes it even more fun to ride now. So far this exhaust system from Trinity Racing has proven to be constructed well with quality components, has a great looking finish, and definitely doesn't disappoint in power delivery. It will be a great system for a large variety of riders, in all environments. There doesn't seem to be any downsides, and the price tag of $439.99 is very good considering the addition of chrome plating. To place an order, simply check out their website or give them a call at 1-877-FASTOYS.

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Scale: 1=terrible, 2=poor, 3=fair, 4=very good, 5=excellent