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Thread: Header size 1 3/4" or 1 5/8"
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11-30-2007, 03:00 PM #1Junior Member
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Black- 97 firebird WS6
Header size 1 3/4" or 1 5/8"
What header size are most of u using? My mechanic friends say that 1 5/8 is sufficient unless you have serious motor mods. They said 1 3/4 for a car w/ bolt ons won't be as good. What's your opinion?
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11-30-2007, 04:03 PM #2Member
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Black- 1998 Trans Am
Most cars are using 1 3/4
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12-15-2007, 09:14 AM #3Member
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Sunset Orange- 2002 TransAm
1 3/4"
2002 Sunset Orange TransAm 6 spd.
http://www.mustangmods.com/data/1327/dadsigpic2.jpg
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12-15-2007, 05:22 PM #4Member
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Blue- 2001 Pontiac Trans Am M6
1 3/4
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12-15-2007, 05:23 PM #5Slow'er'Ass
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Red Tint Jewelcoat- 2008 Trailblazer SS
Most aftermarket longtubes for the LT1 and LS1 motors are 1 3/4" primaries.
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12-16-2007, 10:43 AM #6Member
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Silver- 2002 WS6 Trans Am
Pacesetters are the most common LS1 headers, and they only come in 1 3/4" (longtube).
2002 WS6 Trans Am, A4, SLP lid, P&P TB, 3500 stall, 24K GVW tranny cooler, HPTuners, Pacesetter LTs, Bassani dual exhaust with 'x' crossover, coolant bypass, sealed airbox to hood.
http://www.cardomain.com/id/jag42420
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12-16-2007, 01:44 PM #7Junior Member
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Black- 2000 TransAm WS6
Yea 1 3/4 is the way you want to go, even if its your only mod. I have 1 7/8 and I have a friend that has 2"
now our motors our bigger cubes but 1 3/4 is what you need!Mike Berry
2000 TransAm WS6 A4
ASC#6552
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