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blightmike · 02-26-2016, 06:29 PM

Hey, just recently installed the Borla 140496 Cat-Back Exhaust. I'm really impressed with the looks, sound, and performance from the exhaust. However, lately i've noticed a strange "thump" after quickly releasing the gas pedal while I'm driving. More specifically, it sounds similar to a lower pitched drum being hit. This thump happens on practically every gear if i take my foot off the gas quickly. I didn't notice this with the oem exhaust so it has to be the new exhaust. Im thinking that the one of the bolts to the catalytic converter is loose. Any ideas?

02-26-2016, 06:29 PM	#1
blightmike Junior Member Join Date: Feb 2016 Drives: Brz Location: Florida Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thump sound from Borla Exhaust? Hey, just recently installed the Borla 140496 Cat-Back Exhaust. I'm really impressed with the looks, sound, and performance from the exhaust. However, lately i've noticed a strange "thump" after quickly releasing the gas pedal while I'm driving. More specifically, it sounds similar to a lower pitched drum being hit. This thump happens on practically every gear if i take my foot off the gas quickly. I didn't notice this with the oem exhaust so it has to be the new exhaust. Im thinking that the one of the bolts to the catalytic converter is loose. Any ideas? Last edited by blightmike; 02-26-2016 at 07:11 PM.