I have found a set of MAC mid-lengths with y-pipe for cheap, but they are TF4420(01-02) for 01 and 02 models. What is the difference? I might be purchasing a 99' Z28, and wondered if there would be any issues. thanks in advance

 

Where did you find them at for cheap?

 

The only difference will be the absence of a place to hook up your EGR to the header.

 

I want mac mid tubes headers to because fitting,not to loud an raspy,and easy to hook up.
And have a 10 rwhp pickup LT'S are more like 15 but what the hell just 5 hp .

 

My previous car went mid 120s in the 1/4 with MAC mids, they will get the job done.

Longtubes will no doubt make more power though, and they can fit just as well if you aren't going off-roading.

If it's about saving money, you can get painted pacesetters for rather cheap as well. Both are great options.