vtecjunkie

will a header from a 4th gen si (h23) fit on a vtec model, what about o2 sensors, any difference?

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H22 still sitting, B17 running strong

NirVTEC

I believe the whole flange is different. I may be wrong though. When I bought my Greddy, the invoice said SI(I have VTEC) so I am a little curious too. I think I've seen the ? asked before, don't remember the answer. I know the exhaust has to be customized between the 2.

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1993 Prelude VTEC(a.k.a. GATOR)13.37@108mph
-JDM H22A(267whp/240tq)*100% TUNED*

1994 Prelude Si(a.k.a. SMURF)
-JDM H22A(187whp/152tq-@LL MoToR)*UNTUNED*

Mark94

A header from an Si will not fit on a VTEC. Not sure about the O2 sensors ( I wouldn't take a chance, use the correct parts ).

Mark

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94 Prelude VTEC - garage queen - SOLD
03.5 Titanium Grey Mazdaspeed Protege - new garage queen
07 SSM Fit Sport - daily driver

AIM: MarkSpeed94

NirVTEC

Perfectly said!!!

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1993 Prelude VTEC(a.k.a. GATOR)13.37@108mph
-JDM H22A(267whp/240tq)*100% TUNED*

1994 Prelude Si(a.k.a. SMURF)
-JDM H22A(187whp/152tq-@LL MoToR)*UNTUNED*