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 2024-2020 Isuzu NPR-HD Left | Direct Fit | EPA/CARB Compliant | 645128
$2,999.44
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 2024-2020 Isuzu NPR-HD Right | Direct Fit | EPA/CARB Compliant | 645129
$2,999.44
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 2018-2011 Freightliner MT55 Right | Direct Fit | EPA/CARB Compliant | 645134
$2,623.98
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 2018-2011 Freightliner MT55 Left | Direct Fit | EPA/CARB Compliant | 645133
$2,623.98
ARISTO's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency...
Best AP Exhaust catalytic-converter for 2022-2015 Chevrolet Colorado Front | Direct Fit | EPA/CARB Compliant | 644252
$932.82
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 2023-2018 Volkswagen Atlas | Direct Fit | EPA/CARB Compliant | 644251
$2,091.24
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 2013-2010 Mazda 3 Front | Direct Fit | EPA/CARB Compliant | 641617
$1,508.54
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 2022-2017 Chevrolet Colorado Right | Direct Fit | EPA/CARB Compliant | 641644
$1,356.66
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 2011 Workhorse W62 Right | Direct Fit | EPA/CARB Compliant | 645135
$2,536.48
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 2011 Workhorse W62 Left | Direct Fit | EPA/CARB Compliant | 645136
$2,536.48
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 Front Lef | Direct Fit | EPA/CARB Compliant | 645137
$929.22
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 2024-2018 Jeep Wrangler Front Left | Direct Fit | EPA/CARB Compliant | 641642
$1,204.40
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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$132.00
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