Premium EPA/Federal converters built for performance, durability, and reliability.
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Do more than keep the light off

The Federal/EPA market is on a race to the bottom. Converter manufacturers are putting less and less precious metals in your converters and overseas companies are putting almost no metal at all! This means you aren't catalyzing any of the harmful emissions from your vehicle and only keeping the "light off."

Miller CAT is committed to cleaning your harmful gases and keeping the check engine light off. We're using OEM technology to bring you the most efficient, durable, and affordable solution out there.

MCATX EPA/Federal Converters

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MCATX 4.55" Expandable Ends EPA Spun Converter with O2 Sensor Bung
$175.00
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MCATX 4.55" Expandable Ends EPA Spun Converter
$167.00
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MCATX 4.55" EPA Spun Converter with O2 Sensor Bung
$168.00
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MCATX 4.55" EPA Spun Converter
$160.00

MCATX Manifold insert converters

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MCATX 4.55" Spun Manifold Insert Converter
$155.00
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MCATX 4.55" Manifold Insert
from $160.00
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MCATX 4.55" Extra Duty Expandable Spun Manifold Insert Converter
$310.00
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MCATX 4.55" Expandable Spun Manifold Insert Converter
$164.00
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MCATX 4" Spun Manifold Insert Converter
$147.00
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MCATX 4" Manifold Insert
from $140.00
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MCATX 4" Extra Duty Expandable Spun Manifold Insert Converter
$250.00
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MCATX 4" Expandable Spun Manifold Insert Converter
$140.00