OVERKILL
$100 Site Donor 2021
OR you could just put some high-flow cats on, STILL be emissions legal, still get the power gain, and not have to worry about being a gross polluter?
My Town Car (89) had the stock 4-cat H-pipe. It barely passed E-test two years ago. The top cats started to come apart a few months later so they were temporarily replaced with some straight pipe.
So, this year, I replaced the straight pipe with TWO high-flow 3-way Magnaflow cats for an amazing total cost of about ~175.00.
Car blew ZEROES on CO, and WAY below the limits on everything else.
Back with my old Mustang, I ran it through the E-test (we have non visual in Ontario) with no cats. It passed. BARELY. So, cats are not a necessity to get through an E-test. Would I do it again? No. With the price of the Magnaflow ones, and the fact that there was no discernible difference in power output on the Town Car, it's just not worth it.
MANY Mustang dyno tests have shown that with a good set of HIGH FLOW cats, that the power difference between them and an offroad H-pipe is only 1 or 2HP. Obviously on the factory 4 and 6 cat systems, there is going to be a greater loss, but I think switching to a pair of high-flows and still being able to pass an E-test is a much more logical solution than simply slapping in a straight pipe and hoping you don't get nailed for not having them. I know, I got one last year, it was 380 dollars and the officer was being REALLY nice.
My Town Car (89) had the stock 4-cat H-pipe. It barely passed E-test two years ago. The top cats started to come apart a few months later so they were temporarily replaced with some straight pipe.
So, this year, I replaced the straight pipe with TWO high-flow 3-way Magnaflow cats for an amazing total cost of about ~175.00.
Car blew ZEROES on CO, and WAY below the limits on everything else.
Back with my old Mustang, I ran it through the E-test (we have non visual in Ontario) with no cats. It passed. BARELY. So, cats are not a necessity to get through an E-test. Would I do it again? No. With the price of the Magnaflow ones, and the fact that there was no discernible difference in power output on the Town Car, it's just not worth it.
MANY Mustang dyno tests have shown that with a good set of HIGH FLOW cats, that the power difference between them and an offroad H-pipe is only 1 or 2HP. Obviously on the factory 4 and 6 cat systems, there is going to be a greater loss, but I think switching to a pair of high-flows and still being able to pass an E-test is a much more logical solution than simply slapping in a straight pipe and hoping you don't get nailed for not having them. I know, I got one last year, it was 380 dollars and the officer was being REALLY nice.