The spectre filter i bought from autozone had rubber adapters in different diameters, that fit into the filter to make it from 3"-4". Thats 4in diameter aluminum sheet FYI.
So i bought my 90 degree elbow which was 4in in/out. Cut it, then i put one of the adapters in the end and attached it to my tb. So i didnt need the 3 to 4 coupler, the adapter dealie took my 4 and made it into a 3.25 whcih went nicely onto the tb. looks like this:
and today i made a heatshield that looks like this
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