I am changing the motor mounts in my 91 Z28, and I have the three bolt clamshell kind. I got in a hurry and ordered the four bolt ones. They are just inserts. How different can they be? Will these still work? I'll call Energy Suspension on Monday, but for now if anyone knows for a fact I would really appreciate it.

 

Okay confused, think I will use these though. On the ES sight, the application guide shows 3-1116. Thats what I got. But there is only three bolts holding it to the cross member + the through-bolt. They have never been changed so I shouldn't be missing any bolts. Need opinions. I know alot of you have done this. Am I spazzing out over nothing?

 

When I put solid mounts in my car the new mounts have 4 holes but the crossmember only has 3 so I just used 3. These are the mounts specific to third gen only.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.89
Best MPH on a time slip: 121.52 altitude corrected to 125.89
Altitude corrected rear wheel HP: 497.9
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley