buddy of mine hooked up a redline and it didnt work to well ,, truck would jerk alot and just didnt run the same as it did with the comp drag so they stackd them but for ****zzz and giggles they hook the comp up to a pump cover wire then they hooked the redline to the factory black wire , it work better butt still wasnt wright so after a few calls to CHIP they sent the box back and it had a crack board , so we'll c what happens next week