[Stlthnmrdrd]

Originally Posted by TacoJova

As someone who is about to go catless cause of built motor with turbos does anyone make a resonated set of downpipes? On my f80 with turbos I had Resonated AR Designs with resonators in the midpipe with a Remus rear to eliminate the rasp that catless gives. Add to the fact that on that particular car turbos made it soo much louder. I wonder if adding resonators to the primaries would be effective for rasp

The rasp on the f90 gets crazy with the remus setup.

the oem back box,Eisenmann sport (not race), and akra back box is great at keeping the rasp down while retaining a deep tone.

X pipe mid pipe helps as well, but if u want resonated supersprint and eisenmann has.

As for downpipe, AA, redstar, fabspeed, and keller sells hjs dp. IM pretty sure they will be ok to run on whatever power u are going for, BUT they HAVE TO BE HJS. Fabspeed claims hjs cats is capable give 93% of what a straight pipe gives (flow wise).

[FloridaM5]

I don’t have my f90 any longer, as of a couple years ago; however, I ran catless primaries, oem secondaries, with the Remus catback. No fuel smell at all. I learned on previous cars, full catless is not for me anymore. I also remember a deep, even sound with no/minimal rasp. I didn’t run the car in sport plus though, unless racing, as the pops and bangs were too much for me as a daily.

Ran several different aggressive stage 2 tunes and such. Car was quite the performer for me.

[916_M5]

Originally Posted by FloridaM5

I don’t have my f90 any longer, as of a couple years ago; however, I ran catless primaries, oem secondaries, with the Remus catback. No fuel smell at all. I learned on previous cars, full catless is not for me anymore. I also remember a deep, even sound with no/minimal rasp. I didn’t run the car in sport plus though, unless racing, as the pops and bangs were too much for me as a daily.

Ran several different aggressive stage 2 tunes and such. Car was quite the performer for me.

any sound / video clips you can please share with us?

[FloridaM5]

Originally Posted by 916_M5

any sound / video clips you can please share with us?

Unfortunately, I do not. Sorry about that.

[Tdotwin]

Following

[TacoJova]

Originally Posted by Stlthnmrdrd

The rasp on the f90 gets crazy with the remus setup.

the oem back box,Eisenmann sport (not race), and akra back box is great at keeping the rasp down while retaining a deep tone.

X pipe mid pipe helps as well, but if u want resonated supersprint and eisenmann has.

As for downpipe, AA, redstar, fabspeed, and keller sells hjs dp. IM pretty sure they will be ok to run on whatever power u are going for, BUT they HAVE TO BE HJS. Fabspeed claims hjs cats is capable give 93% of what a straight pipe gives (flow wise).

I actually have a custom X pipe made for the Remus that helped so much with rasp.
Sadly the tuners I’ve talked to say ill eventually just melt the cats

[Stlthnmrdrd]

Originally Posted by TacoJova

I actually have a custom X pipe made for the Remus that helped so much with rasp.
Sadly the tuners I’ve talked to say ill eventually just melt the cats

It will take a lot to melt hjs cats. Like Highest burble setting and tracking the car almost everyday a lot

[916_M5]

Originally Posted by TacoJova

I actually have a custom X pipe made for the Remus that helped so much with rasp.
Sadly the tuners I’ve talked to say ill eventually just melt the cats

MELT?!

[IMPC]

Originally Posted by Stlthnmrdrd

Pretty sure that will help a lot with smell, rasp maybe slightly. I believe the secondaries are 200 cell cats.

.

This is a f90 with 200cell hjs with akra full exhaust stand still revs

same car, but in motion @14:25

Can the hjs downpipes of the highflow 200cel in video be ordered?

[IMPC]

Originally Posted by AustinM4AlpineM5

Attachment 3337442

Attachment 3337444

Attachment 3337445

How many cel catted with stone catted downpipes?

[Stlthnmrdrd]

Originally Posted by IMPC

Can the hjs downpipes of the highflow 200cel in video be ordered?

You have to message them on instagram.

[AustinM4AlpineM5]

Originally Posted by IMPC

How many cel catted with stone catted downpipes?

I’ll let you know what they say when I hear back.