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 2023-2019 Ford Transit Connect Fron | Direct Fit | EPA/CARB Compliant | 641637
$1,775.34
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best DieselTech catalytic-converter for 2000-1997 Chevrolet K2500 | Direct Fit | Stainless Steel | 649079
$3,150.02
Genuine OEM substrates enhance durability, upgraded stainless steel canisters improve durability and resist corrosion, precision-crafted...
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Best DieselTech catalytic-converter for 2002-1996 Dodge Ram 2500 | Direct Fit | Stainless Steel | 649075
$2,835.00
Genuine OEM substrates enhance durability, upgraded stainless steel canisters improve durability and resist corrosion, precision-crafted...
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Best DieselTech catalytic-converter for 2002-1996 Dodge Ram 2500 | Direct Fit | Stainless Steel | 649059
$2,790.00
Genuine OEM substrates enhance durability, upgraded stainless steel canisters improve durability and resist corrosion, precision-crafted...
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Best AP Exhaust catalytic-converter for 2008-2006 Dodge Ram 1500 Front | Direct Fit | EPA/CARB Compliant | 645233
$1,445.92
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 2021-2018 Ford Expedition Right | Direct Fit | EPA/CARB Compliant | 645141
$1,405.00
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 2024-2022 Mitsubishi Outlander Rear | Direct Fit | EPA/CARB Compliant | 644243
$1,165.46
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 2019-2015 Lincoln MKC Front | Direct Fit | EPA/CARB Compliant | 644240
$1,005.36
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 2018-2014 Subaru Forester Rear | Direct Fit | EPA/CARB Compliant | 643170
$1,097.32
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 2023-2017 GMC Acadia Front Right | Direct Fit | EPA/CARB Compliant | 641636
$897.70
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 2023-2017 GMC Acadia Front Left | Direct Fit | EPA/CARB Compliant | 641635
$897.28
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
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Best DieselTech catalytic-converter for 2007-2005 Ford F-250 Super Duty | Direct Fit | Stainless Steel | 649076
$2,700.00
Genuine OEM substrates enhance durability, upgraded stainless steel canisters improve durability and resist corrosion, precision-crafted...
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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