SIMON LC Posted March 22, 2007 Share Posted March 22, 2007 I have just fitted TRD cat back system to my N/A.She sounds sweet but a little quiet.Dont get me wrong,I dont want anything studidly loud but would like a little more volume off this sweet note.Does de-catting just the second cat make much difference to the volume or is it too much? Quote Link to comment Share on other sites More sharing options...
s3upra Posted March 22, 2007 Share Posted March 22, 2007 Is this a Genuine TRD or the ebay xs power copy?(just interested as i want a quiet-ish exhaust). Removing second cat will increase the noise,but not by that much. Quote Link to comment Share on other sites More sharing options...
silvershark44 Posted March 22, 2007 Share Posted March 22, 2007 Full decat should add some noise especially on an N/A Quote Link to comment Share on other sites More sharing options...
JODY T Posted March 23, 2007 Share Posted March 23, 2007 I removed the 2nd cat on my Nur Spec, It definatly changed the tone for the the better... I find if you totally decat the NA, you loose back pressure and the performance drops off.... Quote Link to comment Share on other sites More sharing options...
CJ Posted March 23, 2007 Share Posted March 23, 2007 Full decat should add some noise especially on an N/A That's quite an understatement. Removing just one cat increases the noise significantly. Removing 2 will really make your neighbours know you are around! Quote Link to comment Share on other sites More sharing options...
SIMON LC Posted March 23, 2007 Author Share Posted March 23, 2007 So just the 2nd cat is the way to go? Quote Link to comment Share on other sites More sharing options...
Dave Posted March 23, 2007 Share Posted March 23, 2007 I removed the 2nd cat on my Nur Spec, It definatly changed the tone for the the better... I find if you totally decat the NA, you loose back pressure and the performance drops off.... both my cats are off and mine feels quicker and its not that loud Quote Link to comment Share on other sites More sharing options...
Dave Posted March 23, 2007 Share Posted March 23, 2007 So just the 2nd cat is the way to go? the first cat is the more restrictive ask chris wilson ive got one of his 1st cat [nearest engine] bypass pipes fitted. Quote Link to comment Share on other sites More sharing options...
CJ Posted March 23, 2007 Share Posted March 23, 2007 both my cats are off and mine feels quicker and its not that loud What exhaust is on it Dave? I have just sold an NA with one cat on and an RSR exhaust and it was plenty loud enough for me Quote Link to comment Share on other sites More sharing options...
SIMON LC Posted March 23, 2007 Author Share Posted March 23, 2007 Mine was a genuine TRD system and its just bit louder than standard but makes a nice crisp sound. Quote Link to comment Share on other sites More sharing options...
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