MAC prochamber H-pipe

[eromzek]

Does anyone know what kind of power gains the MAC prochamber H can deliver? I know X's are good for 10-15 hp, but I was wondering if it was the same with an offroad prochamber. Thinking of goin with the prochamber midpipe with either magnapaks or jba's muffler

 

[Mossberg]

It should have the same gains roughly.

 

[s_odum]

I went from 269 RWHP to 286 RWHP with my off road pro chamber and an SCT xcalibrator 93 octane fuel tune.

 

["car"azy]

the complete kit sounds good, headers all the way back, they also claim their cai dosn't need tuning and puts down 16hp

 

[85_SS_302_Coupe]

Typical rule of thumb is that X's give a tad more top end HP with the same tad bit lost in low end torque, and visa versa for an H pipe. The Prochamber is something like a "wide open" X on the inside, only with H style sides...kinda hard to explain but its sort of like the two combined. I've read that on a 5.0 the gains are maybe a couple hp more than the other two, but you won't notice them anyways so pick what you'll like the sound of.