We are really excited with the results of these pipes. You will get a gain of 18 HP and 10 ft/lb of torque. Your sled will also be 6-8 lbs. lighter! These pipes produce incredible midrange pull and good top end power with the peak at 7950 RPM. They were created to be mountain pipes, but have proven worthy on the race track. These pipes are tight under the hood, but are designed to work with stock DPM system. They come powder coated to keep them looking new and to stop the rust. Order your set today, and bolt on the horsepower tomorrow!