BMR’s 4th Gen F-Body Tunnel-Mount Torque Arms: Power to the Pavement

The 4th Generation Chevy Camaro and Pontiac Firebird have never been more popular for performance enthusiasts – they’re an affordable foundation for everything from building a corner-carving track day car to a dedicated dragstrip weapon. For racing and high performance street applications, their solid axle design is a great starting point, but the factory torque arm mount that puts suspension loads through the transmission housing can be a potential Achilles heel.

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To solve that problem, industry leader BMR Suspension has created two different tunnel-mount torque arm systems for these popular cars. They provide a load path for driveline loads to the chassis instead of the transmission, and offer a five-position front mount for instant center and pinion angle adjustment. Their design also adds chassis rigidity, and the forward mount can be ordered with an NHRA-legal driveshaft loop for drag racing applications, or one can be added after-the-fact.

The BMR torque arms can be purchased with a NHRA-spec driveshaft loop, or one can be added later.

The BMR torque arms can be purchased with a NHRA-spec driveshaft loop, or one can be added later.

Made from 1.25-inch, .120 wall tubing, the torque arm features a chromoly adjuster for on-car fine tuning of pinion angle. BMR offers their 4th Gen chassis mount torque arm in designs for both standard exhaust Y-pipe layouts, as well as for long tube headers and true dual exhaust systems.

The TA012 torque arm is designed for long tube headers or large-diameter Y-pipe setups to allow the exhaust to run under the mount, without compromising ground clearance.

The TA012 torque arm is designed for long tube headers or large-diameter Y-pipe setups to allow the exhaust to run under the mount, without compromising ground clearance.

About the author

Paul Huizenga

After some close calls on the street in his late teens and early twenties, Paul Huizenga discovered organized drag racing and never looked back, becoming a SFI-Certified tech inspector and avid bracket racer. Formerly the editor of OverRev and Race Pages magazines, Huizenga set out on his own in 2009 to become a freelance writer and editor.
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