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Order Straight Tubing for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Check here for special coupons and promotions. Order Straight Tubing for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Squirrelly 2.5' Inch Stainless Steel Mandrel Bend Angles Turbo Fabrication Shops and Racers Alike Straight Pipe Tubing 16 Gauge 3FT Exhaust System. 4.9 out of 5 stars 26. 4' Stainless Steel Straight Tubing - 2 Foot (24') 4.5 out of 5 stars 4. (2-1/2' Diameter - 10' Long) 17-Gauge Straight Exhaust Tube. 2.8 out of 5 stars 4.
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.
Editor’s Note: The easy to read tube size charts replace our original exhaust diameter calculator for ease of use.
Quick Exhaust System Math
Easy 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.
Good Way To Estimate: Take engine RPM x engine displacement, then divide by two. This is the intake volume. 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).
Exhaust Pipe Size Estimate: A good section of straight pipe will flow about 115 CFM per square inch of area. 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:
NOTE: These numbers are just estimates.
All pipes are assumed to be 16 gauge steel.
All pipes are assumed to be 16 gauge steel.
Exhaust Component Sizing and Fitting ~ ID vs OD
Learn about how individual exhaust components are measured, fit together, and what tools and techniques you’ll need to put together a well-fitted, leak-free, custom exhaust system.
Carl Pritts, a tech adviser at Summit Racing, explains inner diameter (I.D.) vs. outer diameter (O.D.) measurements and shows various clamp and joint options, depending on your particular components…
Exhaust Back Pressure and Tube Diameter
Learn about back pressure, how it works and why it is important to your engine. Ultimate general: civil war 1 0.
Al will also give you a break down of which diameter exhaust tubing you should choose depending on if you choose a single or dual exhaust and the horsepower of your engine.
Also of Interest:
Aluminized Y Pipes
Reversible, all legs of the y-pipes are mandrel bent for smooth exhaust flow. Y-pipes with a specific application will fit in
place of the factory muffler for use on dual exhaust systems with 2-1/4' tail pipes. Single inlet/dual outlet.
place of the factory muffler for use on dual exhaust systems with 2-1/4' tail pipes. Single inlet/dual outlet.
Inlet | Outlet | length | outlet spread | Application | Part # |
2-1/4' id | 2-1/4'od | 1980-1996 Ford | 0030000 | ||
2-1/2' id | 2-1/4'od | 1994-2005 Dodge,1997-2004 Dakota | 0030001 | ||
2-3/4' id | 2-1/4' od | 1994-1995 GM, 1996-1998 GM pu V6, 305 V8 | 0030002 | ||
3' id | 2-1/4' od | 1988-1993 GM, 2005-2008 Dakota | 0030003 | ||
2-1/2' id | 2-1/4'od | 1997 Ford | 0030004 | ||
2-1/2' od | 2-1/2' od | 1981(+) Camaro muffler replacement pipe | 0030006 | ||
2' od | 2' od | 15-3/4' | 4-1/2' c/c | universal | 0030007 |
2-1/4' od | 2-1/4'od | universal | 0030008 | ||
2-1/2' od | 2-1/4'od | universal | 0030009 | ||
3' od | 2-1/4'od | universal | 0030010 | ||
2-7/8' id | 2-1/4' od | 2003 Dodge Hemi | 0030011 | ||
2-3/4 id | 2-1/4' od | 2004-2005 Dodge Hemi | 0030012 | ||
3' od | 3' od | universal | 0030014 | ||
2-3/4' id | 2-1/4' od | 1999-2006 GM | 0030015 | ||
2-1/2' id | 2-1/4'od | 1998 Ford | 0030016 | ||
2-1/2' id | 2-1/4' od | 1999-2008 Ford | 0030017 | ||
3' od | 2-1/2'od | universal | 0030018 | ||
2-1/2' od | 2-1/2'od | universal | 0030019 | ||
3-1/2' id | 3' od | universal | 0030020 | ||
4' id | 3' od | universal | 0030021 | ||
3' id | 2-1/4' od | 2003-2005 Dodge Hemi 3/4 ton | 0030023 | ||
3' id | 2-1/4' od | 1994-1995 GM | 0030030 | ||
3' id | 2-1/4' od | 1999-2006 GM, 2006-2008 Dodge Ram Hemi 1/2 ton | 0030031 | ||
3' id | 2-1/4' od | 1999-2002 Ford Super Duty | 0030032 | ||
2-1/2' id | 2-1/4' od | 1987-1996 Ford Super Duty | 0030033 | ||
2' id | 2-1/4' od | 1982-2008 Ford Ranger | 0030034 | ||
2-3/4' id | 2-1/4' od | 1992-1993 Dakota | 0030035 | ||
2-1/2' id | 2-1/4' od | 1991-1992, 1994-1996 Dakota | 0030036 | ||
2-1/2' id | 2-1/4' od | 1973-1987 GM | 0030037 | ||
Flanged | 2-1/4' od | 1982-2003 S10 | 0030038 | ||
4' id | 4' od | universal, muffler replacement for use in diesel dual kits | 0030044 | ||
5' id | 4' od | universal, muffler replacement for use in diesel dual kits | 0030054 |
Aluminized Balance Tubes
Kit # | Buy It Now | Size | Tee-Fitting # |
1001111 | BuyIt Now | 2' | |
1001112 | BuyIt Now | 2-1/4' | 1001143 |
1001113 | BuyIt Now | 2-1/2' | 1001144 |
1001114 | BuyIt Now | 3' | 1001145 |
4' | 444002 | ||
5' | 445002 |
Each kit contains two tee fittings, straight and v-tube, and six clamps. For universal applications. Tee-fittings available separately, listed above.
Part # | Application | Description |
0030005 | 1996-1999 GM w/350 c.i. | 2' id inlet, 2-1/4' od outlet |
0030013 | 1996-2006 GM heavy duty | 2-1/2' od inlet/outlet |
1029122 | 2015 Mustang GT--o.e. resonator replacement |
These balance tubes will fit in place of certain 1996-2006 GM dual inlet mufflers.
Universal X Tube Kits
X-Tube Kit Part # | Buy It Now | Size | X-Center Section Part # |
1001128 | BuyIt Now | 2-1/4' | 1001140 |
1001129 | BuyIt Now | 2-1/2' | 1001141 |
1001130 | BuyIt Now | 3' | 1001142 |
Kits contain one x-tube, all clamps, and four 45 degree bends, made of aluminized tube. Not for 4WD vehicles.
Narrow X Pipes
X-pipe with inlets and outlets that are parallel. Designed mostly for late model pickups where the exhaust is routed down one side of the drive shaft, or where there are space limitations. Made of 16 guage aluminized mandrel bent tubing. Weather guru accurate weather forecasts 2 2.
Part # | Size | long | center/center | Buy it now | Application |
1001137 | 2-1/4' | 19.75' | 4.5' c/c wide | Buyit now | |
1001138 | 2-1/2' | 20.75' | 4.5' c/c wide | Buyit now | |
1001139 | 3' | 23' | 5' c/c wide | Buyit now | |
1052019 | 2-1/2' | 36' | 3.75' c/c wide | Buyit now | 2010-2014 Camaro SS |
1452019 | 2-1/2' | 36' | 3.75' c/c wide | Buyit now | 2010-2014 Camaro SS 409 s/s |
1029120 | 2015 Mustang GT--o.e. resonator replacement |
Universal X Tube Kits With Cutouts
1-1/2 Exhaust Pipe
Similar to above, but with a cutout incorporated in each side after the x-center junction. Kits contain one x-tube, all clamps, and two 45 degree bends, two 45 degree bends with cutouts and hardware, made of aluminized tube. Not for 4WD vehicles.
Webtolayers 1 1 2 Exhaust Pipe Fittings
Part # | Size |
1001132 | 2-1/2' |
1001133 | 3' |