I have an opportunity to purchase a used set of Mac headers and a Mac prochamber from a performance shop that is swapping them out to put a set of JBA'S Headers and Off road H pipe. They were on the car for 1 season.
My question is.... what kind of gains could I expect from this set up.
I had my cardyno'd and as of now I am pushing 276 rwhp and 296 rwtq.
I am thinking of doing the udp's and delete plates next but if the gains are the same with the exhaust I would do that first as I like the way their car sounded.
Oh and by the way, their car wasdyno'd at over 360 rwhp and 390 rwtq and it was all naturally aspirated.
So let me know what way to go.....

 

a couple things here
1. What are you current mods?

I assume you have cai/tune so by adding the lts and new midpipe you might pick up 10-12. By doing the CMCV you will allow the LTs better airflow so they are recommended IMO.

2. With cai/tune, UDPs, CMCV, LTs and prochamber you should see 295-305 probably and maybe 310.

For 360 RWHP, you will need every bolt on and head/cam work done also.

 

My current mods are a C&L Racer CAI, SCT XCAL 2 Tuner running a SUTTONHP 93 tune, I still have the Brenspeed 93 and 87 tune on the tuner, I also have FRPP 373 gears
When they did the dyno run they couldnt dyno it with the Brenspeed tune because they said they couldnt get 3rd gear to lock up for the pull so I had them write over the 91 tune with their 93tune and in my opinion it pulls like a mother compared to the Brenspeed tune.
By the way I have an automatic

 

You want 4th gear to lock on the dyno, not third, 4th is the 1:1 gear so you numbers could be off alittle. hmm this is the first time i think i have heard anything about SuttonHP not knowing their ****

 

Yes, I was confused with it also but thats what Doug told me, Maybe he meant lock it out of 3rd so he can get the pull in 4th. I don't no for sure, I was sleeping when my wife got me up to tell me my car was ready to be picked up and he was gone when I got there.
I will have to talk with them again tomorrow when I pick up my pulleys.

 

I would think lock it out of third is what was said. Sutton knows their stuff, and have no reservations providing folks with real world recommendations and numbers...

John