[murph-54]

Nick,

I have your your exhaust system with teh 2nd cat delete and love it. However, I'm thinking of going to AR catless DP's and adding your HFC's by welding them into the system. Any experience on how this will affect the sound?

[Nick@aep]

Originally Posted by murph-54

Nick,

I have your your exhaust system with teh 2nd cat delete and love it. However, I'm thinking of going to AR catless DP's and adding your HFC's by welding them into the system. Any experience on how this will affect the sound?

Yessir. I would describe what you are going to do (Adding catless DPs and our secondary HFCs) as sounding nearly the same as your current setup. It will be just a tad bit louder, but its still very comfortable, does not emit that distinct smell or extra noise.

Nick

[PaulBailey@ltbmw]

Originally Posted by murph-54

Nick,

I have your your exhaust system with teh 2nd cat delete and love it. However, I'm thinking of going to AR catless DP's and adding your HFC's by welding them into the system. Any experience on how this will affect the sound?

I would suggest getting some hiFlo catted downpipes and leaving the exhaust as is.
Or trying to pick up the hiflo catted AE midpipe that comes with the exhaust.

[KWY91]

Originally Posted by Nick@AEPerformance

Yessir. I would describe what you are going to do (Adding catless DPs and our secondary HFCs) as sounding nearly the same as your current setup. It will be just a tad bit louder, but its still very comfortable, does not emit that distinct smell or extra noise.

Nick

You got full inbox!

[Nick@aep]

Originally Posted by M3_Kidracer

You got full inbox!

Cleared, sorry.

Nick

[Nick@aep]

Everything back in stock!

http://www.e90post.com/forums/showth...39#post5852839

[Kurfer]

Does anyone know if this quad exhaust works with the Hamann style diffuser that goes on the stock bumper?

I really want quad exhaust tips but don't want to change the entire rear bumper!

Currently my 335i has the Dinan stage II tune, wondering if i'll get noticeable HP gains from the quad catless AE exhaust combined with AR catted downpipes.

[SSSS]

hi guys, wondering wat is the main and big difference between catless and High Flow Catted version ? i thought with catless will make more power than High Flow Catted? but why High Flow Catted version is 300 more expensive the catless one? thanks in advance

[jpsimon]

Originally Posted by SSSS

hi guys, wondering wat is the main and big difference between catless and High Flow Catted version ? i thought with catless will make more power than High Flow Catted? but why High Flow Catted version is 300 more expensive the catless one? thanks in advance

Simply put: it costs more because the cats cost money.

[SSSS]

Originally Posted by jpsimon

Simply put: it costs more because the cats cost money.

but does that mean better performance or less performance? b/c from my understanding, the cat restrict the flow doesn' it? so basically it means spend more money to get a cat to reduce the power of the exhaust? then it doesn' make sense to me...anyone can correct me if i'm wrong?

seriously diggin the exhaust, but not sure wat is the best for performance part.

Thanks in advance

[jpsimon]

Cats are there to reduce emissions. If you don't care about emissions you go catless. If you care about emissions and/or live in a state with strict rules you'd need an exhaust with cats. The cats in this system are high-flow "performance" cats... they flow much better than the ones you'd find on a stock exhaust but still help to reduce emissions some (and allow you to pass emission testing). Any high-flow-catted exhaust piece will always cost more than an equivalent version without cats.

Any cats an exhaust company puts in their system costs them money, and thus the price of the exhaust must be raised some.

[SSSS]

Originally Posted by jpsimon

Cats are there to reduce emissions. If you don't care about emissions you go catless. If you care about emissions and/or live in a state with strict rules you'd need an exhaust with cats. The cats in this system are high-flow "performance" cats... they flow much better than the ones you'd find on a stock exhaust but still help to reduce emissions some (and allow you to pass emission testing). Any high-flow-catted exhaust piece will always cost more than an equivalent version without cats.

Any cats an exhaust company puts in their system costs them money, and thus the price of the exhaust must be raised some.

Thanks for the explaination there , but wonder if with the high flow cat, will it reduce any power compare with catless? thanks again

[jpsimon]

The cats in this section of the exhaust are the secondary ones... so power loss between high-flow and catless will be minimal.

[Wickede92]

jpsimon,

how you like the AE exhaust so far? can you really feel a difference in performance? what are your pro's and con's about the exhaust?

[jpsimon]

Originally Posted by Wickede92

jpsimon,

how you like the AE exhaust so far? can you really feel a difference in performance? what are your pro's and con's about the exhaust?

greatest exhaust one can buy IMO I am essentially an unofficial spokesperson because I love the exhaust so much.

[Nick@aep]

Originally Posted by Kurfer

Does anyone know if this quad exhaust works with the Hamann style diffuser that goes on the stock bumper?

I really want quad exhaust tips but don't want to change the entire rear bumper!

Currently my 335i has the Dinan stage II tune, wondering if i'll get noticeable HP gains from the quad catless AE exhaust combined with AR catted downpipes.

It does fit with that hamann style diffuser. (http://www.e90post.com/forums/showth...=1#post5857147)

You will absolutely notice gains with the exhaust on your car. There are gains to be had on a completely stock vehicle.

Let me know if you'd like to order one.

[Nick@aep]

Originally Posted by jpsimon

The cats in this section of the exhaust are the secondary ones... so power loss between high-flow and catless will be minimal.

Correct. The difference is negligible due to them being high flow. We use 200 cell metal substrate HFC.

[Vicko]

Originally Posted by Nick@AEPerformance

Correct. The difference is negligible due to them being high flow. We use 200 cell metal substrate HFC.

Hi
the only thing I will like to know is the diference in sound tone at low rpms and mild city driving, this with hfcatts and completly cattless, both cases with catless dps

thanks

[ar design]

Installing another AE system today...... Will post up results later!

[Nick@aep]

Originally Posted by Vicko

Hi
the only thing I will like to know is the diference in sound tone at low rpms and mild city driving, this with hfcatts and completly cattless, both cases with catless dps

thanks

Well, in order from loudness it would go like this

Loudest-
Catless Downpipes w/ Catless Exhaust
Catless Downpipes w/ High Flow Catted Exhaust
Stock Downpipes w/ Catless Exhaust
Stock downpipes w/ high flow catted exhaust

Driving around town, if you'd like it as quiet as can be with an exhaust... go with our high flow cats, and keep your stock downpipes. We've never had a complaint about around town driveability even with our standard system without the high flow cats, but its completely relative to your taste for exhaust sound.

[Nick@aep]

Originally Posted by ar design

Installing another AE system today...... Will post up results later!

Awesome!! Post some results.

That system got there fast.

[ar design]

Originally Posted by Nick@AEPerformance

Awesome!! Post some results.

That system got there fast.

Install went really smooth, customer was very pleased. Car sounds GREAT!!! Thanks guys!