Offshoreonly.com - Exhaust Upgrade Results

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redstinger

11-26-2008 10:52 AM

Exhaust Upgrade Results

Just swapped out the stock iron manif for Merc 496 alum manif on my 454, Chaparral 2550 sx. Picked up 2 mph on the top end, better holeshot and mid range punch. Next I'm going to take out the turbolators between the riser and manifold and see if that makes a difference. Then its on to the carb upgrade. Current carb is orig from the 330hp, so probably running lean.

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