I recently had the JBA Silver Ceramic coated shortys done, at the same time as the UD pullies and delete plates. I love the improvement, but have not yet had it on a dyno. I am considering the FRPP X Pipe, but don't want to change the exhaust note too much....They sound great with the Flowmasters......

 

Just because I happened to be looking for actual dyno charts for headers this afternoon... The JBA Cat4Ward equal length shorties seem to make some quite impressive numbers.



According to their dyno testing, just adding those shorties was good for 21HP and 25LbFt.

Mind you, that is on a car that already has a CAI, Tune, pullies and a new set of mufflers... so if you're running a bone stock engine, you might not see the same numbers. But for $380.73 from the factory (for plain stainless) it might be worth it.

I think for your $400 that's probably a pretty good deal. Normally those are $500 headers.

Again, I'd like to say that I am in no way affiliated with JBA, and I'm really not pimping their products, I just happened to be looking today, and had some info.

From the same thread I was previously discussing these headers... BBK Headers Dyno Results for an 06 GT with BBK shorty headers (CAI and throttle body baseline).