Here's a quick table that shows how many CFM each common pipe size will flow, as well as the estimated max horsepower for each pipe size:Īll pipes are assumed to be 16 gauge steel. Use this same volume of air for the exhaust system, but then correct for thermal expansion (you need to know exhaust temps to figure things out).Įxhaust Pipe Size Estimate: A good section of straight pipe will flow about 115 CFM per square inch of area. Good Way To Estimate: Take engine RPM x engine displacement, then divide by two. Quick Exhaust System MathĮasy Way To Estimate: Your intake system needs to flow 1.5 CFM per engine horsepower, and your exhaust system needs to flow 2.2 CFM per engine horsepower. The tables below are basic references to help guide you to the exhaust-pipe size needed to balance the prevention of excessive back-pressure while maintaining adequate exhaust-gas velocity.Įditor's Note: The easy to read tube size charts replace our original exhaust diameter calculator for ease of use. Kits contain one x-tube, all clamps, and two 45 degree bends, two 45 degree bends with cutouts and hardware, made of aluminized tube. Similar to above, but with a cutout incorporated in each side after the x-center junction. Webtolayers 1 1 2 Exhaust Pipe Flange Aluminized Balance TubesĢ015 Mustang GT-o.e. Universal, muffler replacement for use in diesel dual kits Tell us about your vehicle to find the right parts faster. See search results that fit your vehicle. 7 S 0 P O N S O A R P A 7 E E D-1-1 U J-1 0 F J-1-1. 2PCS 2 1/4' Exhaust Flex Pipe Stainless Double Braid 2.25' x 6' / 10' Long.
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Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Order Straight Tubing for your vehicle and pick it up in store-make your purchase, find a store near you, and get directions. Place of the factory muffler for use on dual exhaust systems with 2-1/4' tail pipes. Y-pipes with a specific application will fit in Reversible, all legs of the y-pipes are mandrel bent for smooth exhaust flow.
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