I am getting a SS with MAC mid legths on it and I will be taking them off and putting on either Kooks 1 7/8-2 or American Racing headers. Would it be possible to make the MAC headers work on my 05 Silverado with a 5.3? Also what is needed and what are the benefits of putting a LS6 manifold on the 5.3? I will be removing it and installing a FAST 90/90. Thanks

 

yes macs will fit...just a little modifacation required

 

I am guessing that they will be better than what is on there now correct? Will I be able to use the MAC y pipe or not? What about the LS6 intake would it be worth the time? The car is coming with a 85 TB and a LS6 intake and a 85 MAF and I thought about taking all that and putting it on the truck since I have no plans to keep it on the car. What gains should I expect? Thanks

 

Nevermind I was thinking about it and my truck is DBW and the Camaro won't be. Oh well would the LS6 with the MACs be worth it? The truck is stock minus a Nelson tune, free mods, 160 stat, no cats and a 3 inch single in single out Magnaflow

 

Anyone else have any input on the MAC headers on my truck?

 

If you already have them then try it and see how they fit, the y-pipe may or may not not especialy if its a 4x4. you got nothing to loose. For the LS-6 intake, I would just do a search and youll find all kinds of info. If you have it throw it on and see if you like the new tourque curve, you can always change it back.

 

I've got a set of Mac's mid-lenghts on my 5.3. Installed without any modifications at all...bolted right up.

 

Did you use the f body midpipe or no?

 

I think dozerdan had the mac midlengths on his truck. I don't think he used the fbody midpipe though.

 

yeah I had them and had a custom ory built. I'm pretty sure the fbody ypipe won't fit.

I don't know how they guy up there got his to fit without modifacation unless he bought quiks old setup