Cornwall-Bow Posted October 30, 2021 Share Posted October 30, 2021 (edited) I've just bought a Milltek backbox and center pipe but no y pipe. My question is considering the Milltek bore diameter is 3 inches and the OEM bore diameter on my y pipe is 2.5 inches what size gasket/flange do I need to safely attach them together? Edited October 30, 2021 by Cornwall-Bow spelling Quote Link to comment Share on other sites More sharing options...
Andy_Muxlow Posted October 30, 2021 Share Posted October 30, 2021 Go for a 3” gasket to match the larger bore. 1 Quote Link to comment Share on other sites More sharing options...
Cornwall-Bow Posted October 30, 2021 Author Share Posted October 30, 2021 28 minutes ago, Andy_Muxlow said: Go for a 3” gasket to match the larger bore. Awesome will do, thanks for the reply Andy! 1 Quote Link to comment Share on other sites More sharing options...
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