Exhaust› Catalytic Converters

MAGNUM

HEADACHE RACK 2020-2023 GM 2500+ HI

$1,895.00

SKU: M068 420HPBRE1NW

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The MAGNUM 420HPBRE1NW is a universal weld-on high-flow catalytic converter for gas engines with 351 to 450 HP. It claims to increase horsepower by 5-7%, improve torque and acceleration, enhance throttle response, and boost fuel economy by up to 3%. It features an alloyed steel body, 300 CPI ceramic substrate, and an integrated heat shield.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMAGNUM
Part NumberM068 420HPBRE1NW

Videos

Magnum: Headache Rack Installation - Straight Stake Pocket

Magnum: Headache Rack Installation - Straight Stake Pocket
How to Install MAGNUM Headache Rack DIY

How to Install MAGNUM Headache Rack DIY
Magnum: Headache Rack Installation - Drill & Bolt

Magnum: Headache Rack Installation - Drill & Bolt
MAGNUM back rack...good choice or expensive mistake??

MAGNUM back rack...good choice or expensive mistake??
Magnum Headache Rack / 2024 Ford F350

Magnum Headache Rack / 2024 Ford F350
HOW TO INSTALL MAGNUM HEADACHE RACK ON A 2021 GMC 2500 . Episode 98

HOW TO INSTALL MAGNUM HEADACHE RACK ON A 2021 GMC 2500 . Episode 98
Magnum Truck Racks | Low Pro Headache Rack

Magnum Truck Racks | Low Pro Headache Rack
Magnum Truck Racks - Fit Your Truck

Magnum Truck Racks - Fit Your Truck
Unboxing - Magnum Headache Rack / Back Rack and Tube Extenders

Unboxing - Magnum Headache Rack / Back Rack and Tube Extenders
How to install Magnum Manufacturing Rear Rack on a Chevy Silverado

How to install Magnum Manufacturing Rear Rack on a Chevy Silverado

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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