Hey all, new posting here. I just got a new project truck first, LS (LY5). It's a 07 Sierra 1500 Extended Cab, M30 Transmission, LY5 Engine. I wondered about everyone's experience or suggestions on new aftermarket Manifolds or headers. I am leaning away from switching them out to new manifolds and would like headers (Give advice, please) because I plan to do a ton of work on this truck. Switching them out because I believe they are warped (a snapped bolt on either side), and if one is, I'd rather replace the left and right(Both manifolds have snapped bolts).

Wanting to do a VVT and AFM delete eventually.

Please leave advice and suggestions below.

Some further information about my skillset/knowledge base and the truck; I am 19 and do this as a hobby; I am entirely self-taught. I have been working full-time in the trades since 16, working 350+ hour months since, and needed a hobby, so in enters the truck. I also have to repair and change a few things. I have a ton of tools and have invested pretty well. I have new rear absorbers on the way, and I am going to replace the CVs, sway links, and do a rust job on the entire underbody when I have time / a good space to do it. I am open to suggestions from you all about where to look/what to change first. As well am most definitely open to parts suggestions! Also, sending any good reading material would be appreciated.

 

If more power with say a camshaft swap is in your future, just go straight to long tube headers. Don't even monkey with new exhaust manifolds.

Also a 2007 LY5 only has AFM, they didn't come with VVT until 2010.

 

Sweet, thank you for the information! Any suggestions for brands to explore or locations?

 

Speed Engineering all day every day

 

1 7/8", don't waste your time with anything smaller