PRO CIRCUIT FULL DUAL EXHAUST
— Pushing ponies through a Raptor, By the staff of Dirt Wheels —
More power is a concept that we appreciate at Dirt Wheels, even when we know we don’t realistically need more. One of our most cherished ATVs is Yamaha’s Raptor 700. It is fast, fun and powerful. Obviously, we couldn’t simply leave the engine stock when we picked up our 2018; we had to pull more ponies out of the torque-monster motor. Pro Circuit delivered a full T-6 dual exhaust system to our power-greedy hands and we tested the $895 system out!
You can instantly tell that this T-6 system is very well made. The exhaust is made from stainless steel, which includes the head pipe, mid pipe, end caps and both canisters. The muffler brackets are made from machined aluminum to cut down on weight and add strength and durability. All of the welds on the system are clean and TIG-welded. The T-6 duals have USFS-approved spark arrestors that are removable for closed-course racing. The kit comes with hardware to mount the mufflers and springs to attach the mid pipe and mufflers to the header.
This install was quite easy for a dual muffler system. We took off the old system, starting with removing the muffler and then the stock header. You use the stock header nuts to mount up the new system.
Our first step in installing the Pro Circuit system was to loosely mount the header pipe (don’t tighten it all the way down). Then we routed and mounted the mid pipe that connects to the header via a spring and a mounting bracket that utilizes a stock bolt and location. Next, we removed two rear grab-bar bolts that the mufflers utilize for mounts. We connected the mufflers to the mid pipe with the included springs and mounted the mufflers in place with the new hardware. Finally, we tightened down the header once the rest of the system was installed.
It is important to note that wrapping the mid pipe in heat wrap can decrease the heat exchange from the muffler to the rear shock. Doing this can decrease shock fade over hours of hard riding. We didn’t notice a huge difference in rear-suspension performance, but the heat wrap will help. We also installed a Dyno Jet Power Commander V to adjust the air to the fuel ratio through the EFI system. It is always a good idea to install a power programmer on a fuel-injection system when you purchase an exhaust; otherwise, you could potentially lose power. These are for closed-course racing only.
More power is exactly what we got through this Pro Circuit T-6 dual exhaust system! After adjusting our PC V to accommodate the new system and removing the Raptor’s airbox lid to allow the engine to breathe deeper, the Raptor flew out of its restricted shell. Gains were made through the whole power range, with the most noticeable in the mid to top end. In stock trim, the Yamaha was strong down low and would fall on its face a little at the end of the range, but not anymore.
The system was throaty-sounding yet not too loud, so you didn’t feel the need to wear earplugs after riding it for a few hours like you would on some other dual exhausts we have tested. We haven’t got any complaints with the performance of this full dual exhaust system! Go to www.procircuit.com or call (951) 738-8050 to order your own system.