backpressure

[motoguy]

i want to do headers and all the research im seein obviously says pacesetter lontubes. sounds good but i got the little 4.8 litre but shes gettin faster. alot of the posts im seein say to do the y pipe with cat deletes, should i do that for for my engine or should i keep the stock cats for the backpressure?

[motoguy]

and one more q, shold i do headers before a allen tune or after? considering it will be about 4 months between the 2

[ff_jeff]

If you get the tune after you get the headers, you will have to cruise with the truck in safe mode. Cat delete cause the CEL to come on. Makes truck run in safe mode. Like a limp. Get tune first. I had my rear O2's deleted so when I put the headers and ORY on I wont get a CEL.

[txarkitekt]

Damn Jeff...you are starting to sound like you know what you are talking about! I am kind of impressed...