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I have a friend with a 240SX T4 turbo set-up and he is using a catco. He likes it. Random tech makes a good high flow cat but the price you're being quoted is too high. You can get it from ebay or groupbuy for about $100. I like the BOMZ one, since it already has the secondary O2 sensor bung with flanges on both ends. I have a straight pipe in my garage. The only problem is, I need to get an O2 simulator to avoid CEL.
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