scott87 Posted February 25, 2013 Share Posted February 25, 2013 Im hopefully buying a new manifold form a member on here but i just wanted to check a few things first. Currently i have the standard backbox, both silencers under the car deleted and a 3" 2nd decat. The manifold obviously deletes the first cat, by question is will i loose too much back pressure, or because i have the stock diameter pipe it should be ok? Also ignore the arb, on the list of things to be repaired! This is the current setup on my car. Quote Link to comment Share on other sites More sharing options...
Nic Posted February 25, 2013 Share Posted February 25, 2013 Do a google search for 'exhaust back pressure myth' Quote Link to comment Share on other sites More sharing options...
scott87 Posted February 25, 2013 Author Share Posted February 25, 2013 Do a google search for 'exhaust back pressure myth' Spot on thanks. After looking at what i have found i am now under the impression the unrestrictive manifold and 2nd decat leading into the standard diameter piping will actually likely be more beneficial. Quote Link to comment Share on other sites More sharing options...
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