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american thunder is the 40 series. SAME THING. theres the 40 series 2 chamber(american thunder whichc i louder) and then 40 series delta flow(quiter) magnaflow and american thunder(flomaster) are to completely different coimpanies
Super 40s are the quieter ones, original are louder right... i have super 40s now and i think im gonna switch to original or slp
Hot Rod sound and more horsepower.
These Super 40 mufflers from Flowmaster significantly outflow the older two chamber mufflers. They help create even more horsepower with less interior noise and a deeper exterior sound. These mufflers feature a design patterned after Flowmaster's race mufflers, with a classic black case. These mufflers far exceed older models on Dyno tests. They create a beautiful hot rod sound, along with increased horsepower and gas mileage.
More power, less noise.
Looking for the most aggressive sound in the Flowmaster line? Then take a look at these 40 series mufflers. Designed for use on street and strip vehicles, they take the sound waves produced in the exhaust, and cancel them against angled baffles built into the muffler case. This improves both horsepower and fuel economy. Best of all, they allow you to hear that cool Flowmaster tone inside the vehicle, as well as outside of it.
o yea if your car doesent break ur not driving it like u should
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