1 3/4" vs. 1 5/8" long tubes

Rockin GT

New Member
May 9, 2006
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Which size is better for my application? My exhaust valves are 1.550" I may add a supercharger in a couple years. Currently running 300 rwhp. I'd appreciate any guiddance or links to relevant test data. Thank you.
 
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I should be ok then. I'm planning on getting the ceramic coated BBKs. The DSS pan is a modified stock pan w/ a wider bottom portion of the reservoir. The MAC LTs I have now don't have a lot of clearance to the pan and required some reshaping near the starter. My main complaints w/ the MACs though is frying my clutch cable and loud resonance from the pro chamber x-pipe when cruising.
 
ok, i can tell you this.....

when you get them, get a 1 3/4 and a 3" collector. the collector is where most of the restiction is like on the BBKs (which fit really well!) and the MACs and Hookers have 3" collector that flows alot more!