[mike@x-ph.com]

Originally Posted by Rdurty2

There are tons of catless downpipes available. Just go to x-ph.com or any other bmw tuning website and have your pick. VRSF is very popular is catless.

Thank you for the referral, we do not sell catless though

[Info@mad-us.com]

Originally Posted by jonezzpeterr

Are there any catless DPs available to buy? I know of the catted ones but I'm looking for catless. Thanks!

We have our 5 inch available right now and our 4 .5 inch will be back in stock very soon.

https://mad-us.com/mad-2052-mad-bmw-...40-m440-supra/

[Seijou]

There's a lot of love for the AA catted downpipe here. Does anyone have experience with the ApexBuilt counterpart?

https://www.shopapexbuilt.com/collec...42349598245021

It seems to be the same pricing (no heat shield), but option for the heat shield is nice.

I am between these two and have heard reports that the ApexBuilt is top-notch in terms of quality.

[mike@x-ph.com]

Originally Posted by Seijou

There's a lot of love for the AA catted downpipe here. Does anyone have experience with the ApexBuilt counterpart?

https://www.shopapexbuilt.com/collec...42349598245021

It seems to be the same pricing (no heat shield), but option for the heat shield is nice.

I am between these two and have heard reports that the ApexBuilt is top-notch in terms of quality.

Per the description of both products, the AA uses the newer GESI cat with a higher flow.

But more importantly, Active Autowerke has an excellent record for support. Their downpipes are the most popular by far, with thousands of them on the market, and they have a perfect record with no hassle exchange when it comes to these downpipes. Most users prefer the more proven product and brand.