Need to quiet down MBRP, headers, ORY
08-05-2018, 10:07 AM
#1
Need to quiet down MBRP, headers, ORY
I have a 2010 Sierra LC9 with ceramic coated LTs, ceramic coated ORY with no cats, and a MBRP catback. It was basically perfect before with just the MBRP, but since installing the LTs and ORY it is obnoxiously loud for a DD under normal acceleration. I'm looking at adding a Dynomax Ultrflow or VR muffler in addition or to replace the MBRP, or add a resonator. Any recommendations?
08-05-2018, 01:58 PM
#2
Imo replace the muffler with a decent sized magnaflow. IMO they are perfect for trucks with no cats. What I use for all my our installs. Nice and tame while cruising but gets decently louder WOT
08-05-2018, 02:27 PM
#3
TECH Junkie
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Vibrant ultra quiet resonators are a straight through design and will quiet it down alot. Add it before you existing muffler and enjoy hearing yourself think again.
08-07-2018, 07:43 AM
#5
I may start with adding a resonator. I love the MBRP sound (2nd system on 2 trucks), but since LTs and removing the cats it is waaaaay too loud under any throttle. If that doesn't work, I'll try a Magnaflow per your guy's suggestions.
The drone isn't bad now, nor was it before. It's just plain loud. It's volume is on par with my 86 Z28 with LTs, H pipe, and true duals into Pypes M80 mufflers dumped at the axle.
The drone isn't bad now, nor was it before. It's just plain loud. It's volume is on par with my 86 Z28 with LTs, H pipe, and true duals into Pypes M80 mufflers dumped at the axle.
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