L31MaxExpress
I'm Awesome
This is what I have on the 1987 G20 with a ~400 hp L31 in it. Thorley tri-ys, Walker 2.5" cats and this muffler. Sounds great IMO and zero drone.
What it sounds like at 75-80 mph and climbing a steep grade. That 1,000 cfm 4150 throttle body has quite the growl. Phone was basically over the engine in my suction cup holder on the windshield. The secondaries start to open at about 65% throttle, power enrichment comes on at 50% throttle or under 7.5 in/hg vacuum.
MagnaFlow 201-9020 MagnaFlow Universal Mufflers | Summit Racing
Free Shipping - MagnaFlow Universal Mufflers with qualifying orders of $109. Shop Mufflers at Summit Racing.
www.summitracing.com
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What it sounds like at 75-80 mph and climbing a steep grade. That 1,000 cfm 4150 throttle body has quite the growl. Phone was basically over the engine in my suction cup holder on the windshield. The secondaries start to open at about 65% throttle, power enrichment comes on at 50% throttle or under 7.5 in/hg vacuum.
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