Best headers for 2013 5.7

[Daw14]

I was able to put a very slight bend on the dipstick tube , that allowed me to reinstall in the same place.


I had no problems with codes.

I drove for two years before adding a 6.4 truck intake . Then tuned it.

 

[Wild one]

I was able to put a very slight bend on the dipstick tube , that allowed me to reinstall in the same place.


I had no problems with codes.

I drove for two years before adding a 6.4 truck intake . Then tuned it.

I've done long tubes and catless mids on a couple now with-out tuning,and with the mini cat 02 spacers under the rear 02's have never had a code show up.My 5.7 300 is running the 6.4 exhaust manifolds/ no cats and the later 2.75" hellcat exhaust with no codes,and it's been like that for several years now,i've opened up the speed limiter and upped the idle rpm,don't really intend on tuning it ,car runs to nice as it is,lol.

 

[Nick@GotExhaust]

If going with LT's, here's some info to help you decide on sizing:
Personally, if staying NA engine and not going too crazy with the mods, I'd go 1 3/4, but that's me.

View attachment 574512

If you opt for LT's go for good quality and stay away from the likes of BBK and brands like them.
Buy once and cry once, then enjoy the experience of improved flow and performance.

@Nick@GotExhaust is a trusted site supporter and vendor and has a wealth of knowledge to help you select the right LT's with new gaskets and hardware.

If you're going to stay with stock manifolds I'd be looking at BD Diesel manifolds with new gaskets and hardware.
These manifolds are an improved design to the OEM stock ones and won't warp down the road.

This is great info here especially with who to contact for a quote
For long tubes our go to is Stainless Works, great fitment, quality, and power gains. We can help you pick out the best setup for your needs. Send me a message and we can talk through it and I can offer you a quote.

 

[RedSRT4Me]

1 3/4" for a street truck vs drag truck.

LT's are a PITA to install, especially on a 4wd.

You will have broken bolts to remove from the manifolds, make sure you have a welder ready

The factory dipstick sucks if you plant to weave it through the primary's

I went with high flow cats and still ended up with rear 02 efficiency codes.

I love the power/TQ gain...BUT in hindsight I might have been better off with BD manifolds or good shorties.

I would guess your cat isn't directly behind the header on the driver side. It probably has a bend in the y-pipe then cat.

aFe Y pipe put the cats directly behind the header and I've yet to have issue with codes

 

[PdPuNOme]

I put an order in for the new afe cast manifolds through @Nick@GotExhaust well see how they work out in the long run!

I was eyeing the BD ones but cannot find info on whether they designed them to have any performance gains over stock like what I see that AFE claims at least. I don't want shorties or longs, but with BD and now AFE getting into an oe solution only makes sense that with a redesign that is better, flow would be better. So now I am comparing the BD vs AFE as the only two options for me, but is the BD hardware design trump the AFE flow gains? The hardware may be more important as that is the weak point in the factory design. BD has more than experience in this realm with diesel engines and it is the same issues as the 5.7 has with factory manifolds warping that causes the hardware to break, so having the shoulder spacers increases the hardware strength and reduces warping, BD has that covered plus the thicker walls, but AFE does not appear to address hardware and soley relies on the thicker walls.

When you get yours be sure to post up about it! Ill be patiently waiting to pull the trigger on the same set.

 

[Cableman]

I was eyeing the BD ones but cannot find info on whether they designed them to have any performance gains over stock like what I see that AFE claims at least. I don't want shorties or longs, but with BD and now AFE getting into an oe solution only makes sense that with a redesign that is better, flow would be better. So now I am comparing the BD vs AFE as the only two options for me, but is the BD hardware design trump the AFE flow gains? The hardware may be more important as that is the weak point in the factory design. BD has more than experience in this realm with diesel engines and it is the same issues as the 5.7 has with factory manifolds warping that causes the hardware to break, so having the shoulder spacers increases the hardware strength and reduces warping, BD has that covered plus the thicker walls, but AFE does not appear to address hardware and soley relies on the thicker walls.

When you get yours be sure to post up about it! Ill be patiently waiting to pull the trigger on the same set.

Yeah both look good. If you look at the afe bolt areas the spacer is basically built into the design so i assume the 2 are using same size bolts vs the shorter stock bolts.

 

[hemihustlin]

I'd think they're tubes under the cover,i'm guessing more like a set of short tube shorties,then similiar to the BD's which are a cast manifold

I looked at them a few weeks ago and as far as i can tell its the same as their upgraded manifold (very similar to bd diesel) just with a fancy ss shield

have a look at their regular upgraded manifold

Experience unparalleled performance and durability with our enhanced Dodge/RAM truck exhaust manifolds, specifically designed for 5.7L HEMI engines. Our Doctor Diesel USA upgraded manifolds address common exhaust manifold bolt failures by incorporating extended fasteners and spacers that effectively withstand thermal expansion. In addition, we've engineered independent mounting locations for the heat shield, separating it from the mounting bolts to further enhance reliability. Crafted with precision, our Doctor Diesel Manifolds boast a robust, thicker design, and are constructed from high-silicon ductile iron to combat warping, ensuring your vehicle remains at peak performance for the long haul.