Picked up an IS300
04-07-14, 09:54 AM
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Picked up an IS300
Hello all. I was lucky enough to purchase a used 2005 IS300, and I'm loving it so far. I plan on keeping it mostly stock since it will be my DD. It's throwing the P0430 code at the moment, but I will get that taken care of before the smog in October. If it is the CAT, has anyone reviewed the Magnaflow CA legal headers? Thanks.
04-08-14, 05:07 AM
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Welcome to Forums, I'm new member too. I have a 300 250 and 350. The Is300 has a harder time finding after market headers. After intense research and tryin to find a header, I learned the best on the market now is the Megan Header with Y pipe. Unfortunatly, the header is backordered but y pipe in stock. No eta. Your gonna get a CEL light. But you have several options to fix that.
04-09-14, 12:22 PM
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Nice to meet you. I was trying to keep this car stock, but an added $300 for California CARB legal headers is ridiculous! (Part # below) I used to be a part of the domestic scene and have no smog equipment on my Trans Am. Can the CEL light be tuned out, or would I need a module like the one I saw online to bypass the code? Thanks.
Last edited by Blue2JZGE; 05-19-14 at 12:24 PM.
04-14-14, 02:18 AM
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There are two ways:
- mechanical unit that electronically disables CEL. Sorry can't remember the name. COBB Tuning???
- trick the O2 sensor by adding a spacer that pulls the O2 farther away.
Second way would probably be the easier and cheaper way. I would recommend this route. Less electrical work.
- mechanical unit that electronically disables CEL. Sorry can't remember the name. COBB Tuning???
- trick the O2 sensor by adding a spacer that pulls the O2 farther away.
Second way would probably be the easier and cheaper way. I would recommend this route. Less electrical work.
04-22-14, 10:27 AM
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^Thanks! I ended up finding some CA legal Magnaflow headers. (Part number 452843 for you Californias who want to keep your car a DD) I painted the calipers this week, and I'm working on the deck and speakers today.
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05-14-14, 10:49 PM
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So the high flow magna flow headers for the is300 are a good choice, mixed in with the Megan racing stainless steel y pipe and your good. It will cost you like $1000 for the whole set up, but it was worth it, in the end. No check engine light.
05-15-14, 11:26 AM
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I thought those headers were just an OEM replacement? Do you have pics?
05-19-14, 07:31 AM
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I replaced the stock manifolds only, and no CEL light for 200 miles so far.
05-19-14, 07:45 AM
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These are the Magnaflow version of the stock manifolds but with high flow cats. I've noticed beter gas mileage (probably due to the bad cat in my stock manifolds) and a little of engine noise at WOT.
05-19-14, 12:13 PM
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Magnaflow released the part on 4/21 and I received a discount for preordering. With CA local Sales tax the total with shipping came to just under $700.00.
