flows

[nocaratall]

whats the differences between american thunder, 40 series and delta series?

 

[travis0712]

delta's are not as loud....and are newer...

 

[jrc_03_gt]

get the original 40 series.

 

[wms004]

whats the differences between american thunder, 40 series and delta series?

"American Thunder" is the entire catback which uses 40 series Delta mufflers. They are a little smoother sounding than the regular 40 series, slightly quieter, and quieter on the inside of the car.

40 series means 2 chamber

 

[03gtdrkpny]

They have delta's in stainless, and they're not that much quieter I like 'em.