I do like Magnaflow but they can be pretty loud. My dual 3" into a single 3.5" is LOUD. It even has dual 3" cats on it (hi flow) and still went 138mph in the 1/4 all motor.
Dynomax makes an UltraFlo which is one of the quieter mufflers I have run.
http://www.dynomax.com/mufflers/ultr...elded-mufflers
Here was my Laguna Seca 92db exhaust.... single 3.5" into dual 3" UltraFlo mufflers. It was stupid quiet and still ran 1:33 there not fully pushing it. 2470lbs wet.... 12:1 compression 438ci with stock LS3 heads/intake, GSR dog box, 18x12's all corners only 530rwhp/510rwtq but torque everywhere.
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Project: 1969 Chevelle, alum 5.3, GTS76 turbo, Chiseled Perf A/W intercooler, Holley Dominator EFI, Davis TC, JRi coilovers, 14" brakes, T56 Magnum. CTS-V Recaro seats!
Coffey Fabrication Nashville, TN doing the fabwork! 800rwhp+/25mpg+/9's@150mph goal
https://lateral-g.net/forums/showthread.php4?t=52976
1993 Mazda FD RX-7, built LS7, T56 Magnum, Holley HP, Davis Tech TC, 8.8" 3.73 Cobra IRS diff, DSS axles, Ohlins coilovers, big brakes.
CCW 18x11 front 315/30/18's and 18x12.5 rear on 335/30/18 RA1's,
2850lbs
10.31@137mph 165mph Shift-Sector 1/2 mile speed
441ci AllPro headed motor and 200lb weigh reduction in the works....
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
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