DsMWookie
15+ Year Contributor
- 360
- 0
- May 3, 2004
-
Birmingham,
Alabama
Are all 4 bolt o2 housings the same as far as diameter or do they come different diameters and what is the diameter of a GT35R's o2 housing if so?
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Depends on what exhaust wheel your running... I have a Gt35R in a 5-bolt housing and it is just a tad over 2.5" big.. I needed the 5-bolt for fitment issues with the turbonetics manifold.. Otherwise i would have went with the 4 bolt... They both have been dynoed back to back and the 4-bolt netted 7whp more and 50rpm spool difference, this was on a 600whp car.. So 5-bolt is not a bad choice...DsMWookie said:Are all 4 bolt o2 housings the same as far as diameter or do they come different diameters and what is the diameter of a GT35R's o2 housing if so?