Replaced my Mak cat-delete kit with Brothers 1 3/4" long-tubes...

[bunk22]

...nothing wrong with the Mak at all, I just wanted a bit more. My car is a 2015 A6 with optional 3.55 gears, a JLT, 1 3/4" long-tubes, no cats and tune. I don't put much stock into dyno's except to see how your tune is doing; it was the same dyno I used for both mods, same tuner, just different days but the SAE correction factor should at least make for an accurate comparison. The long-tubes had gains througout the curve over the Mak cat-delte, though not by much at times. Should be useful for mods like the GT350 intake down the road.

Overlapped with the previous dyno, JLT, Mak delete, tune...

 

[Jeffy_2010]

Good to know, just ordered my mak cat deletes couple days ago

Sent from my SAMSUNG-SM-G890A using Tapatalk

 

[Sir Nate 3000]

Good comparison. How did it change the tone of your exhaust, is it deeper or raspier? Also, why is the graph wavy? Is it because of the auto transmission?

 

[bunk22]

Good comparison. How did it change the tone of your exhaust, is it deeper or raspier? Also, why is the graph wavy? Is it because of the auto transmission?

As far as the sound, it is deeper and to be honest, I though the Mak sounded better.

As for the graph, I don't think so. I've had what, 4 mustangs and 1 C6 Vette over the years, modded every one. Different dyno's, different tuners, etc. but most dyno jets tended to look similar is shape and form, similar programming I suppose. I don't know why it's way, maybe it's slipping and I don't think it's the auto as here are numbers from my old 2012 Mustang GT, it had a cai and full exhaust, Kooks 1 3/4" headers on back (with cats) and was a manual. Same dyno though a different tuner, 4th gear pull...