5.3 Fast intake manifold thoughts?
 

My truck is Fbo, RKV3 cam, 3,600 stall, 4.56 gears, ported and polished heads, and a built transmission with red clutches etc. I was thinking a fast intake should really wake up the 5.3 with all of these mods, but I'd like some opinions and maybe some suggestions on what could be better? Thank you.

I'd look at the power per dollar before you spend the money.

The one LSXR intake with the matching throttle body is well over $1,000 combined and they really don't add a ton of power.

I'd just upgrade to a NNBS/TBSS intake and gain you some cheap power.

Okay, I'll look into those intakes.

What FFDP is trying to say is that you get damn near the same gains at a fraction of the cost with the NNBS intake swap.

People will do what they want. I put the $1k I was going to spend on it and added it to my boost fund. That's what I would do, again and again.

So the nnbs and tbss intake is practically the same?

Not sure on that. Here is a write up on the NNBS swap.

"how-to" 03-07c NBS TBSS/NNBS intake swap | Chevy Truck Forum | GMC Truck Forum - GmFullsize.com

Yes the tbss and NNBS intakes are the same. The fast lsxrt added 20 hp to the wheels on top end of a bone stock 5.3. Yours could be 25-30 possibly. Your cam and heads will like the fast. It just costs a grand. Here's the post
https://www.performancetrucks.net/fo...s-5-3l-464010/

Thanks, I should get to work on the nnbs intake. Save some $$$ haha

Intake article from a magizine...yes id trust it

I put the FAST intake on my 5.3 and its helped out a lot. I have ported heads and big cam, so the bigger intake helped it. With a good tune I picked up 30-45 hp