Thread: Header Question
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Old 03-14-2010, 09:20 PM
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MotorCityRam MotorCityRam is offline
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Join Date: Jan 2010
Location: Royal Oak, MI
Age: 44
Posts: 398
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Vehicle: 2010 Ram QC 4x2
Trim Level: Sport
Color: Inferno Red
Engine: 2009-2010 345ci (5.7L) Hemi V8 390hp 407lb/ft
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Kinda boils down to displacement and power. The smaller of the two will work better for average hp of a 5.7L (pre 4th gen). Stock to high 300s tops IMO (even there a 1.75 kinda seems to make sense). Too big and you lose the scavenging you need for the header to work effectively. Too small and you just choke power.

Without spending a bunch of time and money matching your cam, exhuast, etc it's a bit of a crap shoot either way but, IMO, anywhere near 400 crank hp and you should be considering 1.75" primary if you're planning to continue w/ mods. A stepped header would be kinda cool but I haven't seen anything available like that yet.

Kooks make headers for the Ram's?
Sean M

2010 Quad Cap Sport 4x2 / Inferno Red / HEMI / 3.92s / leather / Truxedo Truxsport tonneau
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