I used a stock air intake baffle from a commonrail to quiet down my billet 475. It was a perfect fit for my intake size which was 5”.
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Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
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