High-flow diesel exhaust systems for trucks and SUVs. 4" and 5" systems, DPF-back kits, and performance upgrades for maximum power and efficiency.
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Best AP Exhaust catalytic-converter for 2005-2003 Chevrolet Express 3500 Left | Direct Fit | EPA/CARB Compliant | 645814
$1,489.14
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2008-2003 Chevrolet Express 1500 | Direct Fit | EPA/CARB Compliant | 645813
$1,753.28
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2010-2007 Chevrolet Silverado 2500 HD | Direct Fit | EPA/CARB Compliant | 645809
$1,610.02
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2007-2004 Dodge Ram 2500 | Direct Fit | EPA/CARB Compliant | 645808
$1,261.78
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2003 Dodge Ram 2500 | Direct Fit | EPA/CARB Compliant | 645807
$1,126.72
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2003-2001 Chevrolet S10 | Direct Fit | EPA/CARB Compliant | 645806
$1,374.76
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2002-2000 Dodge Dakota | Direct Fit | EPA/CARB Compliant | 645805
$1,724.40
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2005-2002 Chevrolet Trailblazer EXT | Direct Fit | EPA/CARB Compliant | 645804
$808.90
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
Best AP Exhaust catalytic-converter for 2022-2005 Toyota Tacoma | Direct Fit | EPA/CARB Compliant | 645803
$1,256.60
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2003-2002 Dodge Ram 1500 | Direct Fit | EPA/CARB Compliant | 645800
$884.36
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2007-2005 Jeep Liberty | Direct Fit | EPA/CARB Compliant | 645798
$3,386.74
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best AP Exhaust catalytic-converter for 2013-2009 Chevrolet Silverado 1500 | Direct Fit | EPA/CARB Compliant | 645797
$1,175.72
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
Frequently Asked Questions
What size exhaust for deleted diesel?
4" is minimum for deleted diesels; 5" is ideal for heavily modified trucks. Larger diameter dramatically reduces EGT and backpressure, crucial when deleting emissions equipment. Straight-pipe or single muffler designs flow best. Note: Emissions deletion is illegal for street use.
Will bigger exhaust help my stock diesel?
Yes! Even stock diesels benefit from 4" turbo-back systems. Expect lower EGT (50-100°F drop), slightly better MPG (1-2), and improved throttle response. Gains increase dramatically with tuning. Larger exhaust is essential foundation for any diesel performance build.
Turbo-back vs DPF-back exhaust for diesel?
Turbo-back systems (from turbo to tip) provide maximum performance by reducing all backpressure. DPF-back systems (behind diesel particulate filter) maintain emissions compliance while improving flow. For stock trucks staying emissions-legal, DPF-back offers best balance of performance and legality.
How much HP does exhaust add to diesel?
On stock diesel engines, exhaust alone adds 10-20 HP. With tuning, the same exhaust supports 50-100+ HP gains by reducing EGT and backpressure. Exhaust is essential before adding power - it's not the biggest power adder itself but enables other modifications to work safely.
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