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Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)

Plenum Spacer Sizing

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Old 04-18-2008 | 08:02 AM
Kidd1077's Avatar
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Plenum Spacer Sizing
im pretty sure I want to buy a spacer for my '04 sedan.. Im just not sure yet what size i want.. the only thing suggested to me was the 5/8".. any other suggestions? it seems like the 5/16 is popular..
 
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Old 04-18-2008 | 05:58 PM
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Originally Posted by Kidd1077
im pretty sure I want to buy a spacer for my '04 sedan.. Im just not sure yet what size i want.. the only thing suggested to me was the 5/8".. any other suggestions? it seems like the 5/16 is popular..
The 5/16 is supposed to provide gains throughout the power band while the 1/2 and 5/8 are supposed to provide more peak power.
 
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Old 04-19-2008 | 10:27 AM
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See the dyno section of our website for analysis on the differences between different spacer heights.

Basically, the 5/16" spacer is optimized for the most gain over the broadest range of RPM.

Tony
 
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