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Old 01-16-2021, 08:54 AM   #57
Scooby Newbie
Member#: 349916
Join Date: Mar 2013
2008 WRX Sti Spec R
WRC blue

Default IAG stage 5 heads vs Crest cast heads

Hi. Thanks for the useful thread with flow rates. Does anyone know what a dual avcs 257 head flows with plus 1 valves and 272 Kelford cams vs IAG stage 5 vs the Crest CNC cast heads? Thanks
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