Having a 440 car comes with a certain distinction. After all, the torquey 440 was one of the largest production engines offered in a factory musclecar, and there’s no debating that the factory moved those heavy bruisers with ease. The “440 Magnum” emblems on the hood of our ’71 Charger R/T gave ample warning to would-be contenders that there was a lot of engine under the hood. But in today’s mean streets, the factory package isn’t always enough to keep the more serious street rats at bay. Sure, it’s unfair to compare a dead-stock musclecar to the hopped-up street warriors roaming the boulevard, but when the light turns green, there’s no one hanging around to check the engine’s date codes. Try as you might to keep a low profile, a Green-Go ’71 R/T with full stripes and spoilers and those 440 emblems on the louvered hood just begs for a confrontation. Thus, we needed to ensure we were packing a serious punch.

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QA1 is excited to release the Quad Adjust Shock, a 4-way adjustable shock for the street performance and racing market.

This 4-way adjustable shock features independent rebound and compression adjustments at both low and high shock speeds. These adjustments allow you to fine tune your suspension for low shock speed situations, such as corner entry and exit, and high shock speed situations, such as hitting bumps or curbs. These adjustments give you maximum tunability, keep the tires on the ground and improve control.

“The Quad Adjust Shock is designed for anyone who is looking for more adjustability to keep a soft feel over bumps and ruts, but still need stiff control while cornering,” Karl Hacken, QA1’s Vice President of Engineering, stated. “Making adjustments at both high shock speeds and low shock speeds can show remarkable improvements in performance.”

Made of high quality aluminum, this coil-over shock has two rebound adjustment knobs for high and low shock speeds. The two compression adjustment knobs are located on the attached reservoir body and adjust both high and low shock speeds. All four knobs offer independent adjustability. The shock and reservoir are connected with a PTFE lined braided steel hose that swivels four directions on the bodies for flexible mounting. Also, a Schrader valve on the reservoir allows for on-the-fly gas pressure adjustments.

Made in the USA, the Quad Adjust Shocks include all necessary coil-over hardware. Multiple reservoir mounting options are also available.