V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

3.1 header bolt size?

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Old

Sep 4, 2003 | 03:10 PM

#1

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Junior Member

Joined: Jul 2003

Posts: 28

Likes: 0

From: mullica hill NJ

Car: 91 Firebird

Engine: 305

Transmission: Auto

3.1 header bolt size?

whats the size of the header bolts on a 3.1? its a 91 rs mfi

Old

Sep 7, 2003 | 12:08 AM

#2

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iTrader: (1)

Joined: Dec 2002

Posts: 185

Likes: 0

From: Shelby Twp., MI

Car: 84 Z28 / 91 Trans Am

Engine: LS1 / 5.0 TPI

Transmission: T56 / 700R4

Axle/Gears: 4.09 / 2.73

10 mm by 1.5 .

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