986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - DIY Exhaust Mod

njbray · 05-29-2016, 11:51 AM

I have 2x 3/4" holes and they didn't make much difference UNTIL I put on the 2nd cat delete pipes! Opened up the air and noise much better. No drone and a little grumble on the downshift!

05-29-2016, 11:51 AM	#277
njbray Registered User Join Date: Sep 2014 Location: santa barbara, CA & Devon, UK Posts: 316	I have 2x 3/4" holes and they didn't make much difference UNTIL I put on the 2nd cat delete pipes! Opened up the air and noise much better. No drone and a little grumble on the downshift!