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Muffler Exhaust Pipe Hanger Bracket 2x Kit compatible for Ford Escape 2013-2019 CV6Z5K291K
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Evap Purge Valve compatible for Ford Expedition V8 compatible for Lincoln Navigator F75Z9C915AA
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1PC EGR Valve compatible for Toyota Camry CE LE XLE 2.2L 1997-2001 25620-74330 214-1289
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Dual O2 Sensor Package compatible for Ford Fiesta 1.6L 2011-2019 AE8Z9F472A AE8Z9G444B
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2PCS O2 Sensor Up Downstream compatible for Chevy Aveo 1.6L 2006-2008 234-4288 96419956
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EGR Exhaust Gas Valve EGRV411 compatible for Chevrolet GMC 3.8L 4.6L 8.1L V8 2001-2011
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1x Engine EGR Valve w/ Gasket compatible for Acura CL 2.3L 1998-1999 4F1890 Electric 5-Pin
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EGR Valve compatible for Chevy Camaro Pontiac Firebird V6 3.8L 1995-2002 17113282 EGV589
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Set of 2 O2 Sensors UpDown compatible for Pontiac Vibe 1.8L 2005-2008 234-9052 234-4233
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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.