I dont' know the answer to your question. This may help.
The invoice included with the package says 05 GTO and it says part # as 2278. Does your receipt say the same? If it does, it could be same sways for both cars. Otherwise, TBynre may chime in....
I got mine the other day and it was definately a great price..thats why i jumped on it. GP asked for 10 orders needed, i think i was like #11 or #12. I come back few days later to check and they had like 36 orders. A lot of people got this great deal.......
Yes they are the same, but there are less things to move on the 05. I can't remember exactly but I think our (05/06) tranny cooler lines are not in the way, but the power steering lines are still an issue. SEARCH and ye shall find detailed install instructions here.
I can tell you. They are worth it, and yes. The 04' and 05'-06's are the same. I have not had to deal with any cooler lines for the trans installing mine(t56). I can tell you, the rear is not bad. But, the front take a little bit of time to get the bars out and back in.
Do the links now, plan for a hassle on the front and rear. The rear took us longer because we refused to drop the diff/cradle. A great story over a beverage some day. The front requires dropping the bolts and lowering the front 6-8 inches. Be patient and you will get it out, we did so without removing any lines (everything the hard way). Do Not get in a hurry and you will be fine. I did it all on a lift and I can't imagine doing this on jackstands but almost anything is possible. Sorry a bit off topic.
Bottom line you will not regret it (front bar mid position, rear full soft) with 19's. Night and day difference once I complete my bushings next week I would say I will be able to keep up with some pricy cars in the twisties.
Install of the rears is gonna hurt you, but when you hear from folks here that bars/bushings "transform the car", the bars are more than 50% of the gain IMHO. Congrats on your acquisition, you will enjoy them a lot !
EDIT: Yes, endlinks are a must. I did Pedders' kit at install time, because many early members here had the stock endlinks bend. Best you get a set of endlinks in hand before you begin.
I guess i am missing something then. Still have my stock front links and bushings. The rear links are stock, but the bushings have been changed in favor of SLP bushings. Front set a t mid, and rear is set at stiff. Helped my wheel hop.
1) it's a PITA so prepare to spend some time on it
2) definitely do urethane endlink bushings, huge diff by themselves
3) order your new Pedders front endlinks now. the stockers will bend on any setting
4) it's all worth it ir_flag:
instead of driving a sailboat you'll actually be able to take some corners
Im not going to make moves on better endlinks until mine bend. I have read many members reporting that endlinks are bending. But mine haven't yet. I have my front in the middle and the rear one down from full. I thought for sure they would bend because I auto-x. But they are fine so far. Im just going to keep an eye on them. Peace.