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I know this has been discussed many a times but I'm still a little confused. Maybe yall can help.
If I buy a race header will it replace the cat? or will it bolt to the cat? Can I just buy Race header, Flex pipe, Hi flow cat and exhaust and have a muffler shop put it all on? Will I need anything else? Would it be easier to just buy the muffler and have custom pipes ran so the cat can be welded on? I am very confused so any help is great. One more thing will this cause the check engine light to come on and will all sensors still hook up? Thanks in advance for the help. Yall are great
adam
also what kinda of gains would i be looking at? noticeable?
If I buy a race header will it replace the cat? or will it bolt to the cat? Can I just buy Race header, Flex pipe, Hi flow cat and exhaust and have a muffler shop put it all on? Will I need anything else? Would it be easier to just buy the muffler and have custom pipes ran so the cat can be welded on? I am very confused so any help is great. One more thing will this cause the check engine light to come on and will all sensors still hook up? Thanks in advance for the help. Yall are great
adam

also what kinda of gains would i be looking at? noticeable?