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8.8 Grade bolts

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Old Apr 18, 2013 | 11:36 AM
  #1  
lakeport's Avatar
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From: SW Ontario
Car: 1988 GTA Trans AM
Engine: 305 TPI
Transmission: 5 speed
8.8 Grade bolts

Will 8.8 grade bolts suffice for the TPI runners to the plenum and to the intake?
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Old Apr 18, 2013 | 12:09 PM
  #2  
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 8.8 Grade bolts

The 8.8 has a tensile strength of 116,000 psi (pound per square inch). The grade 10.9 is used where high strength is required. The 10.9 grade bolt is rated at 175,000 psi.
You can use the 8.8
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Old Apr 18, 2013 | 01:55 PM
  #3  
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From: WI.
Car: 1987 iroc
Engine: 383 TPIS intake, Dyno Don headers
Transmission: 700R4 w/Pro-built Auto/transgo 2-3
Axle/Gears: 3.27/3.70 borg warner 9 bolt
Re: 8.8 Grade bolts

I'd say, you could bolt the runners to a truck and use it in truck pulls.
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