Collector Length Delema

hotrod coupe

Well-Known Member
I am using an outside the rail header on my model a and trying to find the effects of glasspacks on collector length. I have a limited distance between the end of the collector ad the rear fender, the actual collector is 3" and about 4-5 inches long, with sufficient room for turnout after the 24" muffler I only have a few more inches for a collector extension. I could slide the extension inside the glasspack, t is a thrush perforated core that is smooth to cover the holes to get collector length or is this unnessesary with a glasspack of the same diameter.
 
if the inside diam of the muffler is at least the the same or larger, inside diam of the collector ,
and theres no significant reduction or restriction to flow past the muffler you will gain little to zip,
sliding an internal smooth section of exhaust pipe inside the muffler
 
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