Hey everyone. I need to know which kit to buy as this is a critical engine part. I am going to replace the upper intake and lim gaskets on my 03 ss, non superchared. I know the 3 main parts are uim, lim gasket, and coolant elbows, which upper intake is better, the dorman or the other one, any one whose done this job please let me know, thanks

dorman UIM
Dorman - OE Solutions INCLUDES ALL GASKETS - ORINGS - PCV | Product Details | Pep Boys

Or this one?
GM Intake Manifold Kit

Also i need valve cover gaskets, do i need to replace fuel injector o rings during this time? Thanks for any advice any one could give I appreciate it,

 

Have you checked Rockauto online for those parts?

 

actually never shopped online there, ill check them out, thanks. BTW i mainly just didnt know if there was a difference in those kits or if one was better then the other, ill check rockauto out though cool

 

This is the APN UIM kit recommended by the Bonneville crowd. I have not used it myself, but I've read good things. The only issue I've heard is that the ZZP HV3 addon may not fit (but if you don't have interest in a ZZP HV3, then don't worry about it).

APN Link --> GM Intake Manifold Kit

The APN kit comes with all the Upper Intake needs and has re-enforcement where it counts.

Then hit RockAuto for the FelPro lower intake gaskets. As for the elbows, do some research. Dorman plastic ones got a bad rap (specifically last year or so) for pushing out (word on the street was the O-rings were not thick enough). I had it sadly happen to me. I am currently riding on genuine GM elbows. Yes, they are different then the $5 Dorman's (you can see it comparing the two side by side). Is it worth the cost diff, I honestly can't say. Dorman also now makes metal elbows. I believe a couple members are running those ones happily.

 

I just did mine .... on sunday...

I used the dorrman on the upper and dorman elbows...

But I used the felpro aluminum ones on the lower...

Dont use the doorman lower...its plastic!