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need help 1-5/8 or 1-3/4???

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Old Jan 24, 2003 | 01:20 PM
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MILT's Avatar
MILT
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From: Minneapolis, MN
need help 1-5/8 or 1-3/4???
I looking at getting some new SLP headers, and can't decide which size to get. I am currently running a 305 w/ 1-5/8" SLPs. Will I lose much TQ w/ the 1-3/4" or will it not be that noticeable? I am only curious as I plan to upgrade to a 350 or larger this year or the next. The reason I'm upgrading is to get non-AIR headers for track only use...

Thanks,

MILT
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Old Jan 24, 2003 | 01:24 PM
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five7kid
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Buy with an eye on your final goal. The low RPM torque loss will be minimal when installed on the 305.
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Old Jan 25, 2003 | 12:05 AM
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Kevin91Z
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
With a TBI car, I'd keep the 1 5/8".
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Old Jan 25, 2003 | 05:46 PM
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MILT
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From: Minneapolis, MN
Nope, she's not TBI anymore--speed density HSR now!
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Old Jan 25, 2003 | 09:22 PM
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Mark A Shields
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Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
I agree with five7kid on this one.
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