SuperMAXX Stainless Long Tube Headers are an excellent way to bolt on 30 Hp and 30 Ft. Lbs. of Tq. to your Charger, Magnum, 300C or Challenger with a 5.7 Hemi. Although a tune is recommended, these power gains were before the tune! A power tune could add another 20-25 Hp. 100% Stainless Steel construction with a Limited Lifetime Warranty makes the SuperMAXX header second to none. 1.750” primary tubes and a 3.00” collector make a great combination for stock engines and/or upgraded power plants. Fits with automatic or manual transmissions and takes about 5-7 hours to install. Comes complete with detailed, full color instruction manual for easy installation. O2 Extension cables, triple layer stainless steel gaskets, header bolts and all installation hardware are included. Designed for use with Dynatech intermediate sections (part numbers 724-73320 or 724-73330)