Would tailpipe emissions be affected, if the joint between the downpipe and cat inlet is loose? This might allow air to aspirate into the cat, under some circumstances.
As I understand it, some aftermarket downpipes require a loose slip-fit at the cat, not a crimped fit.
note: Los Angeles county emissions testing.
As I understand it, some aftermarket downpipes require a loose slip-fit at the cat, not a crimped fit.
note: Los Angeles county emissions testing.