thank s for the info,i just order from speed daddy,but most of the headers for the supercharged are 1 3/4 of primary tube , i also have a cadillac sts 97 and it s good for the scrap i take off the throttle body to put on my monty do i have to swap the maf and tps ???

 

is the sts a 4.0 Northstar engine?
you will need the throttle body, cable bracket, mass air flow meter, and tps connector harness. or buy one from zzp. https://www.zzperformance.com/grand_...=332&catid=108

you don't need the maf from the N* you swap the stock one from your monte to it. last but not least you will need the adaptor plate for the N*. as far as i know you will not find anyone making the 96-99 N* adaptor plate any more. if you seriously want to do this setup lmk cuz i might know someone still making or can make one for you. i'm running this old N* setup btw.

 

no the northstar it s 4.6 and i do have all the hardware (plug and braquets) but will need the adaptor ! if i can not find i will try to have one machined for me,might need more info about the vacuum plumbing under the n* TB