Gloss Black Performance Diffuser compatible for BMW E90 3 Series M Sport 2005-2011 PP Rear
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2003 2004 2005 2006 2007 2008 Toyota Corolla/Matrix/Pontiac Vibe 1.8L Catalytic Converter
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1997 1998 1999 2000 2001 Toyota Camry 2.2L & 1999 2000 2001 Solara 2.2L Catalytic Converter
1 Offer
Exhaust Header for 2001-2005 Honda Civic DX/LX D17A1 1.7L 4-Cylinder Stainless Steel
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Smog Air Pump Set compatible for Porsche Cayenne 4.5L 2003-2006 7L5959253B Pair
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2008 2009 2010 2011 Chevy HHR/Chevrolet Cobalt 2.2L 2.4L & 2008 2009 Pontiac G5 2.2L Catalytic Converter
1 Offer
Shorty Exhaust Header for 1964-1974 Chevy Chevelle Camaro LS Engine Swap Mirror Polish - KSP Performance
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2008 2009 2010 Dodge Grand Caravan | Chrysler Town & Country 3.3L 3.8L Catalytic Converter
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Fuel Vapor Charcoal Canister compatible for Toyota Tacoma Base Pre Runner S-Runner 2.4L 04
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Complete Secondary Air Injection Pump compatible for Subaru Impreza compatible for Forester 2.5L 2008-2014
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Exhaust Header for Hyundai Elantra and Tiburon 2.0L 4-Cylinder 1995–2000 Elantra and 1997–2001 Tiburon
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Secondary Air Injection Pump compatible for Chevrolet C1500 7849167 8 Cyl 5.7L 88-93
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MufflerExhaust Pipe compatible for Bobcat 1600 642 643 645 742 743 6514737 6569624
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Exhaust Upgrades: Sound, Flow and Staying Legal
Written by the PickupChain team · Last reviewed October 17, 2026
Most truck exhaust upgrades are about sound and a small gain in flow. Axle-back systems replace only the muffler and tips and are the simplest. Cat-back systems replace everything behind the catalytic converter and give a bigger change in sound and flow.
Emissions parts are a different matter. Catalytic converters, diesel particulate filters and EGR systems are required by federal law on road vehicles. Removing them is illegal for street use in all 50 states and can fail inspection. Only buy emissions parts that are listed as legal replacements for your state.
California and states that follow CARB rules require an Executive Order (EO) number for many aftermarket parts. Look for CARB-legal labels if you live there.
Frequently Asked Questions
+Cat-back or axle-back exhaust?
Axle-back systems are cheaper, quicker to install and mainly change the sound. Cat-back systems replace more piping, change sound and flow more noticeably and often add a little power.
+Will a new exhaust cause drone on the highway?
Some aggressive systems produce a low hum at cruising speed called drone. Look for systems with resonators or descriptions that mention reduced drone if you drive long distances.
+Do I need a tune after an exhaust upgrade?
A cat-back or axle-back exhaust does not require a tune. Headers and downpipes often do, and they may affect emissions compliance.