Ok to run with JBA shorty headers with no tune?

[odog422]

I've got a 2012 RT 5.7L six speed and want to add some JBA shorty headers. I live in MD with strict emissions so the shortys seem like the obvious choice. My real question is this: I used to have a Durango that I put shortys on and seemed I got a little more response and definitely a deeper rumble in the exhaust note, and this was without a tune. I've been reading here tunes for headers are a no go yet for the '12's, and obviously performance expectations are different than from the truck, but I thought with this bolt on, you can roll as is and be fine. My concern is I've been reading here about people talking about running lean and needing to "add fuel?"

Any insight/comments/recommendations much appreciated.

[Tofnbad]

I ran jba shortys on my 09 rt for 3000 miles before I got my tune. I didn't have any problems


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[Immortal1]

I don't believe the additional % fuel is needed with the shorties. The long tube headers on the other hand will need some additional fuel.

[odog422]

Originally Posted by Tofnbad

I ran jba shortys on my 09 rt for 3000 miles before I got my tune. I didn't have any problems


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Thanks. What kind of difference, if any, did you notice after you got the tune? Sound? Performance?

[odog422]

Originally Posted by Immortal1

I don't believe the additional % fuel is needed with the shorties. The long tube headers on the other hand will need some additional fuel.

Thanks, good to know.

[dark side]

I have the JBA's. You won't see much gain in performance, but when you look at them vs the factory manifolds.......The engine will breathe or flow 10 times better. There will be a little difference in sound for the better.

[odog422]

Originally Posted by dark side

I have the JBA's. You won't see much gain in performance, but when you look at them vs the factory manifolds.......The engine will breathe or flow 10 times better. There will be a little difference in sound for the better.

Could you elaborate on the difference in sound? You said "for the better." Deeper rumble?

Thanks.

[dark side]

A little more radical, like you cammed it.

[us1champ]

how big of a pain was it to put them in? just wondering if they are any easier than long tubes?

[Tofnbad]

The sound is deeper. I dynoed mine afterward and gained about 25 ( I forget the exact #) but that was with high flow cats.

Took me about 2 days n the garage working at a slow pace. It's not that difficult if u have the right combination of tools.


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