Well finaly got all the parts here for dads XL7. this is the following we will be doing to the truck this week.

JBAUTO lift 1" front and 1.5" rear
AIR LIFT 1000 rear assist
BM Tranny coolers dual detup
AUTOMETER gauges for oil and trans temp.
JBAUTO headers and full 2.5" SS exhaust
30" BFG A/T
Custom intake with moded front intake manifold.

Truck will be hauling a 3400lb trailer and going on long trips 28 hours and so forth

So are those headers one offs???  If not I'm sure people with GV's and Xl's would buy some.

George

There not one offs.

I wanna test them out first get some actual dyno numbers.We are gonna dyno the XL7 before the headers and the exhaust then dyno it after. It cost $100per hour for the dyno.

ouch

There not one offs.

I wanna test them out first get some actual dyno numbers.We are gonna dyno the XL7 before the headers and the exhaust then dyno it after. It cost $100per hour for the dyno.

But its not no pacesetter stuff here. Ive done headeres in the past. I will be doing 2.5 outs with merge collectors. 2.5" Y pipe to a main cat 2.5 carsound to the 2.5" manderal bent exhaust with a resontor and flow master.

On my gv now i have a full 2.5" and its a night and day difference. My buddy on here has a bone stock GV with the same lift,tires and so forth but no engine mods and i pull on him on the highway pretty good. Out of the hole its nuts for whats there.

Are you keep the per-cats with new headers???

George

Nope. elimnating that and moving the the primary o2s behind the main cat. We will see if this will keep the CEL llight off. Pre cats are stupid we have done ETEST on alot of cars with precats and without and they both passed. There only for initail start ups cause most people turn there cars on and drive them.