I recently purchased an 87 GN and just noticed that someone has removed the cat, a straight pipe now resides here. The exhaust is in very good shape, but should I have a cat reinstalled??
Matt
No, it's called a test pipe. It's supposed to be for better airflow through the exhaust. The only reason to put one back on would be to pass inspection depending on where you live.
Tim
When the cat. is replaced buy the hi-flow they are just as good as the straight pipe.
Frank, do not believe the "hype" you hear and read! In 15 years with these cars, NEVER seen any cat, even the supposed high flo, that will flow as good as a straight pipe.
No hype just experence i've owned car since 87
been thru the test pipe,converter thing the works. No big difference. If you live in a state
with emission check it's a hassle. To me it's all
about where you live and your choice.
I just put a test pipe on my '87 T-Type. Stock downpipe and exhaust, yet now everytime I drive the car, the service engine light comes on. It seems to run better to me, but that light just stares at me. Anyone know why that would happen?