ReDSpecV616

Hey I wanted to ask everyone whats the difference between a header with a catalytic converter and a header without one performance wise before i make any mods

way2low

I would go with the converter only because of emissions reasons, unless you know someone who can pass you. The difference with or without should be minimal.

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Black Injen CAI, Eibach Pro Kit, 2.5 Magnaflow Exhaust, 17in.Konig Theory's(graphite),Autotechnic Gauges, White HVAC overlays,03 Maxima 6spd shift knob, Nismo oil & radiator cap, Window Tint

theimportscene

yo redspec,
the cat robs you of precious HP gains... w/o cat you gain 16whp, w/ cat you gain 12whp, and the cat setup costs like 2 bills more!
theres already another cat within the exhaust, you'll pass emissions, and ridding your ride of the precat/header is the best thing you can do for your spec....

about the CEL, greg at mossy hooked me up w/ a AEBS check engine bypass / simulator so no check engine light; the header w/ sim and shipping was about $580...

sonny

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98 B14: eibach prokit, kyb agx/motivational, place racing cai, hotshot header, stromung cat back, strut bars, enkei tuners, short shift, clear tails, cluster swap, kenwood/pioneer/rf audio
03 SPEC: missing engine cover; nismo header w/o cat & AEBS o2 sim, nismo intake, nismo lowdown SOLD
05 FXT: Kartboy s/s, rockblocker

MDMA

SIM was free for me but does cost 40 bucks if you have to pay.
And he's right...Getting rid of the pre-cat is the best thing you can do.
Go with NO cat

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14.7@94.01mph with Heavy ass 18's :D

BEERBUEFF

i put the no cat on my spec, so personally i would say go with the no cat, the way i see it is why would you pay more money for something thats gunna give you less hp then something same quallity, more hp and 2oo less

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NiSmO header, AEM CAI, knock sen., ballance shaft, UR underdrive pully,bOrLa cat back, nissan motorsports short shift, ground control coilovers, koni's "and some GADGES , WHICH ADD LIKE 100HP....." sorry had to diss the ricers