Really quick question on 1991 L98
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From: Northwestern Pennsylvania
Car: 1985 Pontiac Trans Am
Engine: 355 with stuffs.
Transmission: 700R4
Axle/Gears: 4.10 Posi
Really quick question on 1991 L98
on the 350 block, who made the pistons? I'm looking at my roller block (1991)and took #1 rod and piston out, but there's no casting number anywhere. 
I can't even find a GM stamp...
I'm just curious, so any replies, I'd appreciate. Thanks!
I can't even find a GM stamp...
I'm just curious, so any replies, I'd appreciate. Thanks!
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
GM?
I'd guess GM got them from Federal Mogul / Speed-pro
I'd guess GM got them from Federal Mogul / Speed-pro
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Supreme Member
iTrader: (2)
Joined: Jan 2003
Posts: 1,083
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From: Northwestern Pennsylvania
Car: 1985 Pontiac Trans Am
Engine: 355 with stuffs.
Transmission: 700R4
Axle/Gears: 4.10 Posi
This is what confuses me. I had thought they would be silvolite or speed pro deals, but the word "MAHLE" appears on the inside of the skirt. The only numbers I found wouldn't give me anything tangible, after searching with them. I didn't think that GM used Mahle pistons on their factory engines.
Joined: Sep 2005
Posts: 27,918
Likes: 2,448
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
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