I'm curious as well. I'm sure somebody has picked them up but no one seems to admit to it on this board. I'm sure the gain is small, something like 10-15rwhp. For the most part not to many bother with shorties due to cost and gain. I still would like to see the numbers.
The gain is probably more like 5 to 10... the dyno sheet for there product shows the power after and if you look at the sheet thay also added a set of wires... so wires plus headers = whatever so subtract the HP gain from the wires.. and you will have your actual. They do look sweet though, that is the set I am looking at
I just got an email from the guys at Tbyrne who advised you will get a 10-12 HP gain with this install. I like them because they do not void the warranty. I am alittle worried about voiding the warranty because of some of the eary problems people are having with their cars. I like the fact they are a bolt on item and it does not look like it will take much to install them. We all know how much a pain long Headers are to intall.
I will be buying them so I will let everyone know how the install and performance goes. I will have pics as well.
Voiding warranties isn't black/white and comes down to the dealer. LTs move the cats, O2 sensors, etc and in fbodies remove emission fittings. The other issue is how close LTs come to the steering linkage. I guess that may be a basis to void a warranty but i don't know.
Do you think these can be installed in a driveway by a novice? I mean I can do brakes, plugs, oil changes basic stuff.......I wonder how hard they are to install? and would it change the stock sounds too much? I do like the stock sounds....
I received a set of JBA headers friday and had them installed in two hours, Remove the plug wires, (I replaced mine anyways with JBA 9mm wires). Didnt remove the motor mount bolt, the right side slipped right in easily the left side I pulled and pushed on the motor and it slipped right in also. It took two of us for that. one to slide in the header and one to push the engine over. It didn't take much. They bolted up perfect. I bought the ceramic coated ones and they are coated inside and out. Now this last part your not going to believe, but I have witnesses. Saturday they had a Dyno Day at RPM and GTOJ and BAD MOJO were there also. At first it was putting out 302 HP at the rear wheels but they said it was detonating and the computer was cutting back on the timing. So we had Chris a LS1-Edit expert and he went into the PCM and changed the settings and when he was finished the GTO was putting out almost 350 HP. Another GTO that was stock was putting around 280 HP to the wheels. My GTO only has the Borla catback sys. the headers and plug wires and now the tuned PCM.