Arrington Performance has moved to Brighton, Michigan!

All new installations will be performed at our shop in Brighton -- with the same great service and Mopar mastery. Please continue to reach us via email at or 866-844-1245.

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Line Pressure Kits

Increase the shift firmness in your HEMI vehicle with a line pressure Kit. 
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Southern HotRod MOD4 Valve Body: Add this MOD4 Valve Body to your HEMI transmission for firmer and quicker shifts. This valve body was designed using Southern HotRod's Street testing that monitors all clutch pressures, torque converter pressures, and torque converter lock up clutch pressures all with accurate analog gauges. The more aggressively you drive, the firmer the shifts will engage, yet during normal driving the unit engages smoothly. Downshifts are also firmer than stock,... 
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Weight:20.0 lbs