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Old 07-11-2011, 12:20 PM
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Join Date: Jul 2009
Location: Calgary, AB, CA
Age: 30
Posts: 17,173
Gender: Male
Vehicle: 2009 Blown 349 Hemi
Trim Level: Sport - Modified
Color: Brilliant Black/Snake Skin Green
Engine: 2009-2012 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 20
Rep:3272
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If you're gonna supercharge it then I'd say headers would be in your best interest. Headers are the collector tubes that join the exhaust system to the motor itself. There are 3 types: long tunes, mid tube, and shorties. Shorties are similar to stock length, and offer better top-end performance, but no boost to the bottom end; mids give upgrades to the mid-top end, but lack in the bottome end; and long tubes give the best bottom end but rob the top end a bit. Now, these trucks need more effort to get going, so long tubes are your best choice normally, and if youe want to reduce the top end loss, you can install an electric cutout right after the header to remove the backpressure caused by the exhaust system.

Headers by themelves won't give you a big gain, but they will really help with other mods. They allow more air to flow out of the motor and improve the scavenging effects to get peak torque. They won't make your exhaust louder normally, unless you're running a tiny muffler, but expect some changes to the exhaust tone.
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