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Old 09-03-2010, 09:27 AM   #41
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so there is no way for me to put a cat on my focus if i install OBX headers?
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Old 09-17-2010, 11:18 AM   #42
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Are there any headers or manifolds that can be purchased aftermarket for the PZEV 2.3 without failing emissions?
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Old 09-17-2010, 12:38 PM   #43
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so there is no way for me to put a cat on my focus if i install OBX headers?
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Are there any headers or manifolds that can be purchased aftermarket for the PZEV 2.3 without failing emissions?
My two bits on the above as they are related. What is legal vs. what will 'pass' cannot be answered directly as it is based primarily on your location. Example: I live in Saint Louis. I can 'pass' with a header IF > I have a cat (following the header), AND > I have all the factory o2 sensors in place and working (No cheaters). I got this info by simply asking my Ford dealers emissions manager who does my inspections (hint: I inquired there as there the toughest inspection station in my area). lets_FOCUS > your answer is probably yes, but you would have to have modifications (a port) added for the air pump.
but the real question for both is this. What do you expect to gain? I gave up on a header as there is no performance gain to be expected if you have a cat following a header. The cat is the primary restriction. This has been confirmed by both Tom and Randy.
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Old 10-05-2010, 01:12 PM   #44
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got a quick question... im getting a used F2 header for my 2.0 pzev... i figured i should buy a new header gasket to go with it... but do i get the pzev, or non pzev gasket? assuming after the header is installed the engine will no longer be a ''pzev''... thanks...
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Old 11-22-2010, 04:50 PM   #45
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These are some great threads! I would like to have a header, seems like it is not worth the little HP you get,& emissions hassel. And the noise factor too. Its a 4 cylinder there is no getting around the noise.
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Old 11-28-2010, 12:00 PM   #46
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^^a header will get u good gains especially if u get a tune afterwards..ur lookin at @ least 10-12whp after the tune..very noticeable in a 4cyl I think. Mine is coming very soon!
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Old 11-29-2010, 09:54 PM   #47
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anyone know if two resonators is too much or will cause damage..? i got my F2 header installed with a huge 18x6'' magnaflow resonator, its still semi loud and i want that baby to be much stealthier....
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Old 12-06-2010, 11:26 AM   #48
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my header is coming tmrw but what kills me is that i'm not gonna do the install for another 2 weeks! i'll be getting my stealth exhaust then so i wanna do both at once, and a header w/ stock exhaust is no bueno anyways so it'll be worth the wait. and i have my xcal 2 ready to go too! man i love christmas!
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Old 12-06-2010, 05:57 PM   #49
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my header is coming tmrw but what kills me is that i'm not gonna do the install for another 2 weeks! i'll be getting my stealth exhaust then so i wanna do both at once, and a header w/ stock exhaust is no bueno anyways so it'll be worth the wait. and i have my xcal 2 ready to go too! man i love christmas!
congrats man... i love my header....i know youll love yours...
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Old 12-06-2010, 09:32 PM   #50
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anyone know if two resonators is too much or will cause damage..? i got my F2 header installed with a huge 18x6'' magnaflow resonator, its still semi loud and i want that baby to be much stealthier....
I'd go for the F/W steath system to begin with. You used two reonators & no muffler at all. I'd be putting a muffler on, where the stock one goes w/ what you have now, just to see if it quieted it down some. Are you using a tune or a MIL elimanator?
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