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Originally Posted by sentra_hilo
replace the gaskets and you have to relocate your 2nd 02 sensor to behind your cat. other than that its a bolt on
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It's a 99, he'll have to get a cat first.
You will need the header, a cat to place under the car (OEM SE-R cat works perfect) and you will have to modify the exhaust to meet up to the cat. It's easiest to do everything at once so you don;t have to shell out $$ to modify the crappy stock exhaust that you will eventually replace anyway. Save your pennies and do it all at once, you'll save $$$ in the long run.