View Full Version : Motor mounts advise

03-20-2012, 09:50 PM
I was reading about some people having issues with the steering shaft hitting the headers after doing the mounts swap. I want to know what do I do if I were to run into this problem. The thread ended with people just complaining and not posting solutions. Also if you've had this issue what headers were you running?

03-21-2012, 08:38 AM
Steering Shafts hitting headers is a header design issue. Not a motor mount issue.

With LSx motors most run into that issue trying to run 2" Primaries. SOMETIMES 1-3/4" but rare. Most people will just dimple the header in, or run an additional joint. I know some that had to do a custom setup to kick out the shaft and bring it in.

Old LT1 Shafts are the worst due to a big huge lump in the middle, that always interfered with headers. (see LT1 Rag Joint)

03-21-2012, 10:38 AM
From what I have seen it is RARE on anything 1 7/8" and smaller. Pollys will not flex much and will keep your Y pipe from banging the floorboard. I think you will be fine... Love mine!

03-21-2012, 11:29 AM
Thanks guys...also will I feel a difference in power? My LT's bang the shit out of the floor. Could this be why I based with 298/321 and with ls6 intake and LT's with a tune I only made 308/331. I'm thinking the knock sensor?

03-21-2012, 11:34 AM
I did poly motor mounts and 1 3/4 headers. When I went to put the headers in the steering shaft wouldn't allow them. I took the 2 bolts out of the shaft and the header slid right in, connected the steering shaft back and I"ve never had a rubbing/hitting/banging problems yet. eBay headers btw

03-21-2012, 02:44 PM
Header design has came a LONG way since then. I remember the threads you speak of. The headers on the market now-a-days do NOT have those issues.

And get some damned motor mounts! LOL

03-21-2012, 04:14 PM
I have the mounts already...Semper Fi