New Car and Truck Products From Holley

A Very Productive Week

Holley is pleased to announce the release of awesome new products from their family of brands, including Detroit Speed, Hays, Scott Drake, Superchips, and Holley RetroBright.

Detroit Speed Rear Speed Kits For 1967-1972 GM C10 Trucks

holley detroit speed
Detroit Speed’s Speed Kits are a great way to update the factory trailing arm (truck arm with coil spring) rear suspension on your 1967-1972 GM C10. This bolt-on kit uses a combination of components to lower the truck by 5-7 inches for just the right stance and improved appearance with modern day ride quality that is ideal for cruising or hauling.

Hays Hydraulic Release Bearing Kit for Tremec T-56 Transmission Installs

Hays Hydraulic Release Bearing Kit
This Hays Hydraulic Release Bearing Kit fits GM LS T-56, T-56 Magnum, and GM Super Magnum transmissions. Based on the popular 319-100 factory-style release bearing with the added benefit of matched -4AN connections, this hydraulic release bearing is perfect for transmission swaps using aftermarket clutch master cylinders.

Scott Drake 1968-1970 Ford Mustang 428 Cobra Jet Exhaust Manifolds

Holley Scott Drake
These manifolds are an exact reproduction of Ford’s free-flowing, high-performance cast iron exhaust manifolds used on the 428 Cobra Jet, 428 Super Cobra Jet, and Shelby GT500. Concours correct with the original Ford logo and part numbers cast into the manifold. These manifolds are available in early and late versions. The earlier manifold has the correct spacer on the right side while the later version manifold does not. Installs easily and eliminates clearance issues compared to headers. Compatible with factory exhaust systems and H-pipes. Spacer also available separately.

Superchips Expanded Coverage: 2022 Ram 1500 5.7L (DT/”New Body”)

holley Superchips Expanded Coverage: 2022 Ram 1500 5.7L
The 2022 Ram DT (new body) 5.7L has been added for tuning on the Flashpaq 3846-S1 and Dashpaq+ 30627-S1, as well as a quick option on Flashcal 3545-S1. The “DT” chassis Ram has a large amount of potential power, better economy, and room for customization locked inside of them, and Superchips is here with the key. Preloaded tunes can improve power and economy and throttle maps are carefully curved to maximize your driving experience.

Holley RetroBright Adapter – H4 Non-Standard Plug

Holley RetroBright Adapter
If you don’t feel comfortable cutting up your factory wiring or don’t want to attempt to swap pins on your headlight plugs, Holley RetroBright adapters make it a plug-and-play affair. If the standard H4 male plug used on Holley RetroBright headlights will not fit your female socket or you need to swap pins around to match up properly, these harnesses will make the job quick and easy.


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Holley Performance Products





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ABOUT Holley Performance Products®

Holley has been the undisputed leader in fuel systems for more than 100 years. Holley carburetors powered every NASCAR Sprint Cup team and nearly every NHRA Pro–Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM’s popular LS engine are dominating the LS scene as well. Holley’s products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies, Holley can give you the edge you need over the competition.