DeaconBlue

iTrader: (5)

Does anyone that has worked on the LS3/LS7 clutch know if the ARP #134-2201 pressure plate bolts for the LS1/LS6 will also work with the LS7 pressure plate on the stock LS2/LS3/LS7 flywheel? I spent a long time searching but could not find an answer. The 2011 ARP catalog only shows the #134-2201 bolts fitting the Gen III LS1/LS6 application and nothing noted for the Gen IV LS2/LS3/LS7engines.

The GM LS7 pressure plate bolts are #12561465 and are M10 x 1.5 x 25mm. The ARP #134-2201 are also M10 x 1.5 threads, I just can't find out their underhead length. When I do a search on the ARP #134-2201 and include "underhead length", I find quotes noting 25mm, but when you click on the link it does not show anything.

I believe that the ARP #330-2802 bolts for the LS1/LS6 will also work on the LS2/LS3/LS7 flywheel even though they are not listed in the ARP catalog.

TIA

DeaconBlue

iTrader: (5)

I called the ARP Tech Service line this morning and they confirmed that the #134-2201 are 25mm long and that they will fit the LS2/LS3/LS7 pressure plate.

DeaconBlue

iTrader: (5)

Well maybe not so fast.

I ordered the ARP 134-2201 pressure plate bolts and received them yesterday. I test fit them on the LS7 pressure plate, disc and LS3/LS7 flywheel last evening. The ARP bolts seem to bottom out before clamping down on the pressure plate. Hmmm... the APR bolts have a fully threaded length while the GM bolts neck down on the end - see the attached photos.

So I ordered a set of the GM 12561465 bolts this morning and will have them tomorrow.

DeaconBlue

iTrader: (5)

Okay, I picked up the GM LS7 pressure plate bolts #12561465 today and tried then in the LS7 flywheel. The first one bottomed out just like the ARP 134-2201 bolts, so I tried a second hole - same thing. Now I am thinking what the hell is going on here. Well it turns out that the two holes I test fit both the ARP bolts and the GM bolts in had some kind of smutz in the bottom of the holes. A quick in and out with a M10x 1.5 tap then blow out the hole with compressed air and whala, both the ARP 134-2201 and the GM 12561465 bolts work perfectly.

So to finally answer my own question; Yes, the ARP 134-2201 pressure plate bolts do in fact work on the factory LS3/LS7 flywheel and pressure plate.

_JB_

iTrader: (33)

For what its worth, I went from the LS6 setup to the LS7 and I'm almost 100% sure I reused all the stock bolts. I know I didn't order any bolts, so unless the kit came with them, I can't remember.