4" HIPO Muffler For Water Injected Headers 

4" HIPO Muffler For Water Injected Headers

The HIPO High Performance Muffler is designed to tone down the beast in your motor without the loss of major horsepower. It reduces the noise to the low 90 decibels with an idle at 800 RPMs in motors up to 600 horsepower with a loss in horsepower of only 1% -2%. Made from 100% Stainless Steel. Easy installation; just attach one bolt and you are ready to go. Originally designed for blower motors and is now being used in all size motors. So, Tame the Beast and Still Feel the Power.

100% Stainless Steel Hollow Louvered Core with Stainless Steel Wool.  Decibel: Stock to 600 hp in low 90 decibels with idle at 800 RPMs.  Mufflers are 3-7/8" O.D x 10-1/2" long.  Fits in 4" and belled 5-1/8" x 16 gauge Collectors.  Does not fit on 4" x .083" 14 gauge wall tubing.  Installation Kit included; two bolts, two spacers, two washers, and two nuts to attach both mufflers.  Two Mufflers per set .