Hey I am currently running...

GM Stage 3
GMPP Exhaust
Option B Cooling
Dual Pass
ZZP CAI
With aeroforce and wideband to monitor.

Placing a ZZP order this week for a couple maintenance things and was considering the dp or header or combo. Whats the best bang for the buck, 2.5 or 3.0, assume i need catted dp for wideband since they don't offer non and the bung? And how difficult is the install with no lift, but stands and garage of tools? Or how much to pay someone?

Thank you

 

Header dp combo 3". You don't need a cat. Very easy to do with just Jack stands

 

For the header downpipe combo; midlength i only see 2.5 options, is the 3' combo only available using the long tube header downpipe combo? Or can you just order the 3' DP and the header separate, see the 3' DP but not the header alone? Are the gains from mid --> long worth the extra 130$?

Order both gaskets also?
And my GMPP exhaust is compatible with the 2.5' exits

 

3 inch inlet for the DP and 2.5 exit to bolt up to catback