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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,423
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Depending on the build, 1.625" may be too large. Your boost level, amount of air blown through the engine (turbo and porting), redline, xHP @ xRPM goals all affect design for maximum exhaust velocity without choking the engine. With your large heads you would want to open up the gasket protectors and flange area for a smooth transition.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 03-18-2010, 04:13 AM
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