What reducer coupler for LS1 TB and 3" intercooler plumbing?
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I measured my LS1 TB with a tape measure, and apparently I thought it was 4" diameter, so I ordered a 3" to 4" silicone coupler for my 3" intercooler plumbing. I got the coupler today, and it is just a shade too big on the TB side, which leads me to believe that maybe I actually needed a 3.75". Also, I ordered a straight/180* coupler and was wondering if a 45 or 90* would mate up to the plumbing easier?