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 2021-2013 Jeep Grand Cherokee Right | Direct Fit | EPA/CARB Compliant | 644147

$1,175.52

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 2021-2013 Jeep Grand Cherokee Left | Direct Fit | EPA/CARB Compliant | 644146

$1,335.00

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 2016-2012 Chevrolet Sonic Rear | Direct Fit | EPA/CARB Compliant | 644145

$629.30

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 2019-2014 Toyota Highlander Rear | Direct Fit | EPA/CARB Compliant | 644144

$780.74

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 2011-2010 Buick LaCrosse Front Right | Direct Fit | EPA/CARB Compliant | 644143

$1,454.10

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 2020-2013 Nissan NV200 Rear | Direct Fit | EPA/CARB Compliant | 644140

$645.72

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 2014-2009 Hyundai Genesis Rear Right | Direct Fit | EPA/CARB Compliant | 644139

$699.84

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 2014-2009 Hyundai Genesis Rear Left | Direct Fit | EPA/CARB Compliant | 644138

$699.84

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 2020-2013 Ford Fusion Rear | Direct Fit | EPA/CARB Compliant | 644137

$1,099.84

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 2014-2010 Volkswagen Jetta | Direct Fit | EPA/CARB Compliant | 644136

$1,540.90

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 2019-2005 Nissan Frontier Rear | Direct Fit | EPA/CARB Compliant | 644135

$922.90

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 Rear | Direct Fit | EPA/CARB Compliant | 644134

$623.24

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.