msd 3 step

Heat will not affect the 3 step rev control under the hood, nor a 3 step retard nor an MSD Ignition Box.

I know because all of mine are mounted there! Heck I welded my forward strut bars to the upper shock tower and it bubbled the paint under all of them but it did not hurt the electronics one bit. I did not realize any of this until the job was completely done. So if they can take that kind of heat, I would sure think those devices will LOL at the temps under the hood without a shadow of a doubt!