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1) I dont know but the seat of the pants power gain ( and sound ) is very noticeable. 2) This set up passes smog inspections. 3) Much less expensive than long headers and after market exhaust. 4) High flow cats will also improve performance and are also a bolt on to the short headers ( ie, no...

Short headers ( with some minor grinding/modification ) with the stock exhaust is a great “ bolt in/on” modification. Even better if you add high flow cats. sounds fantastic and you will get a decent power increase.

Lol !

Its very simple put drag radials on the rear

You could be trying too hard with E85 conversion but getting rid of the horrible stock log style exhaust manifolds and installing headers ( long tubes or short tubes ) plus high flow cats will be a very great improvement

Btw, good american made stainless steel O2 simulators will work ( stop related codes ) on any brand of cats. And they are a very easy install.

The matching jba high flow cats and mid pipe. The simple solution is to not getting a code is to install o2 simulators. There are a couple good american made stainless steel brands available on the internet.

If i didnt want my privacy i would shared the csm number at the inception of trying to help you.

The improvement is throughout the whole power band. And the high flow cats are an integral part of the improvement ( The stock cats/mid pipe reduce way down to about 1 3/4 " where they bolt up to the header collector which is a restriction ). I owned ( and sold ) a 2013 GT500 Super Snake that...

Here is a pic. Hard to see them. The performance and sound improvement far outweighs the improvement in look.

Btw, I suggest you call Vince Lavolette at Shelby in las vegas directly and discuss this with him. He is the guy that was mostly involved with super snake gt500 design and has most the answers regarding fit.

I like the jba’s because they bolt up to the stock mid pipe/cats and also because they are CARB compliant. And you can get jba’s mid pipe/high flow cats that also fit. No doubt long tubes are better but will not pass smog and will not bolt up to stock exhaust. Anyway you decide to go removing...

Fyi, if I remember correctly shelby lowers the engine so the bigger supercharger will fit under the hood. If so that will make it extra hard for any type of header ( long or short ) to fit. I think that is the main reason shelby leaves the stock log exhaust manifolds on when they do a super snake.

You will need to let the computer re learn the set up ( ie, the first hundred miles or so could me disappointing ).

A couple of the header bolt holes needed to be widened and a motor mount needed to be slightly shaved. I am no advocate of jba however these short headers ( and the jba high flow cats ) make a VERY noticeable improvement. This set up, 4.11 gears , watts link and a good shifter is imo all that is...

We had JBA short headers installed earlier this year ( 2013 GT500 ). There was a lot of minor fabrication needed to make them fit however the end product ( ie, getting rid of the stock log exhaust manifolds ) is fantastic ! Also, they bold up to to the stock exhaust without a problem. We added...

Hello Bob. Do you have a shifter gasket for a 2014 GT500 ( Pro 5 shifter, Tremec 6060 transmission ). Please advise. Thank you ! Joe

Hello Bob, Trying to find your website. Please advise. Thanks !