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Old 05-07-13, 01:23 PM   #1
esoteric88
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Smile Headers and Exhaust fitment

Hey Everyone,

I am looking to buy these parts because they are cheap and will do me justice for now. The question I have is if they would be direct fit into my IS300. I am a n00b when it comes to replacing parts. Can someone shed some light about these parts?




http://www.andysautosport.com/lexus/...c09091060.html

Thank you!!!
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Old 05-07-13, 01:30 PM   #2
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also, how would i know if i need a y pipe? i keep seeing some people with and without them
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Old 05-07-13, 04:02 PM   #3
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If you run an aftermarket header yo will need to do 1 of 2 things in order to pass emissions:
1. Install an o2 simulator
2. Install an o2 fouler

The install is pretty straight foward. You will need to loosen the y-pipe from the header and remove the o2 sensors. You can replace the midpipe with an aftermarket one like the Megan unit. If you are considering it you may as well do it all at one time including a catback exhaust.

You can also purchase a Dezod Green header or Magnaflow header if you want aftermarket catalytic converters installed instead of the sim or fouler.
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Old 05-08-13, 08:32 AM   #4
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oh gotcha tyty!

So if i keep everything catted them I should be good for emissions no?
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Old 05-08-13, 01:52 PM   #5
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Also if you go with that header, you might need to weld in a new O2 sensor bung for b2s1 so it's not hitting the firewall. Don't use non foulers on the upstream sensors.
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