Stock Exhaust vs. Catless....any good vids?

[Krozi]

I know there are tons and tons of threads with dyno graphs showing 20-35 whp gains with a catless exhaust. Are there any vids around showing a real-world performance difference between stock and catless?

Much appreciated!

Thanks

-Krozi

[jeff@autocouture]

smell-a-vid

[Krozi]

Originally Posted by SehrSchnell

Other than sound?

Yea sound is unimportant...I just want to see a stock exhaust car vs. a catless car side by side race.

[rjd598]

i dont think anyone has done a vid like that but everyone can tell from the butt dyno it works. how well? yea a vid comparing that would be nice

[Krozi]

Originally Posted by SehrSchnell

I doubt a side by side race would make any difference, with the better driver the stock M3 would win every time. I believe the Dinan S3-R with the stroker wasn't any faster than the stock M3 in one car magazine test, and that one had a lot more power. There are too many variables...

But if you would drive a stock M3 and then one with a cat less system - you'd feel a big difference yourself.

Yea I would really like to see DCT vs. DCT...

[MeatManCometh]

cats are for crazy ladies!!! lol

let her breathe as deeply as you can...there will a marked difference. whether its a dyno paper, or your seat: you'll gain some power!!!

[Krozi]

Anyone else?

[jjw2331]

Not exactly what you're looking for, but....

This video shows how much faster an M3 is with a high flow exhaust (no primary cats => high flow cats) than a stock M3.

Note the M3 with the exhaust (Active Autowerke) has a tune also. But also remember, the tune doesn't provide the most significant horsepower gain. The exhaust does.

Both are DCT, the black E90 has the exhaust and tune.

[GIdriver]

Originally Posted by jjw2331

Not exactly what you're looking for, but....

This video shows how much faster an M3 is with a high flow exhaust (no primary cats => high flow cats) than a stock M3.

Note the M3 with the exhaust (Active Autowerke) has a tune also. But also remember, the tune doesn't provide the most significant horsepower gain. The exhaust does.

Both are DCT, the black E90 has the exhaust and tune.

Wow, if that videos is for real, it makes a heck of a difference. I'm considering the Akra Evo even more after seeing this.

[Krozi]

Originally Posted by jjw2331

Not exactly what you're looking for, but....

This video shows how much faster an M3 is with a high flow exhaust (no primary cats => high flow cats) than a stock M3.

Note the M3 with the exhaust (Active Autowerke) has a tune also. But also remember, the tune doesn't provide the most significant horsepower gain. The exhaust does.

Both are DCT, the black E90 has the exhaust and tune.

Thank you for posting this.

Anyone else have any other comparisons? Video or not?

[Krozi]

Anyone else have any concrete comparisons?