The Kawasaki KFX 700 HMF exhaust is available as a Slip-On or Dual Full System in the Performance and Competition Series. Depending on the exhaust series, the slip-on system picks up 4 more horsepower, while the dual full picks up 7 more horsepower. The Performance exhaust will be 4-6dB louder than the stock muffler, however, the Competition Inserts or HMF Quiet Core can reduce that 2-4dB. With aluminum mufflers, each HMF exhaust system weighs substantially less than the stock exhaust. Free spark arrestor with each muffler ordered! If you find HMF Exhaust cheaper elsewhere simply give us a call!