Just installed RPi downpipes -- sounds sick

[Fantasm]

BenzWorks in Huntington Beach did the work for me. Fast and great guys.
http://benz-works.com/

So much more turbo whine now! Exhaust is louder and cracklier too!
Here's a very short video I made in my garage.

[RPiM5]

What exhaust are you running? Comp Pack still??

[Fantasm]

Originally Posted by RPiM5

What exhaust are you running? Comp Pack still??

Yes, stock comp pack exhaust. I had assumed I wouldn't need anything more after the DP's and I was right. Its plenty loud now for day to day driving.

[drbru]

Sorry IM going to ask a really stupid question....How are these installed? Are you still retaining your cats?

[Fantasm]

catless downpipes
all my cars are now catless with exception for the X1.

[Fantasm]

Originally Posted by drbru

Sorry IM going to ask a really stupid question....How are these installed? Are you still retaining your cats?

you can get "race" cats or "high flow" cats if you really, really want to have some form of cats on your car.

[RPiM5]

I've still actually never heard catless downpipes with stock Comp Pack exhaust. I always imagined it would be the perfect combination.

[Spinny02]

Congrats!

I can also confirm that stock CP cars do not have a resonator. Miy stick system was chopped in threes for shipping and what looks like a resonator is realy a straight pipe ( no perfs like non cp ). I am sure your car is awesome sounding now!

[ShePearl]

Congrats, OP for the catless downpipe.

I'm also considering on getting a catless downpipe for my M5. However, reading around the forums makes me worried little about two things:

1. Check Engine light. What did you do about this ? Just ignore or did something to prevent the light to come on ?

2. F10's ECU. I'm not the expert. But some seems to say that ECU remap *must* be done with cateless downpipe for optimal performance improvement. (Reducing back pressure like that without ECU remap may damage the car?)

Can you shed some light on it?

Many thanks.

[RickyMfizzile]

Hey I'm a new member two The M-World lol just wanted two and please don't make fun what is the name of the egine in the F10 M5? Lolol

[Fantasm]

Originally Posted by evo2point0

Congrats, OP for the catless downpipe.

I'm also considering on getting a catless downpipe for my M5. However, reading around the forums makes me worried little about two things:

1. Check Engine light. What did you do about this ? Just ignore or did something to prevent the light to come on ?

2. F10's ECU. I'm not the expert. But some seems to say that ECU remap *must* be done with cateless downpipe for optimal performance improvement. (Reducing back pressure like that without ECU remap may damage the car?)

Can you shed some light on it?

Many thanks.

1. My CEL is not on. It may come on later, who cares?? There will be a fix for O2 sensors at some point in the future once ECU's are cracked. In the mean time, NO HARM NO FOUL. A little CEL light isn't causing damage. Whenever I end up putting my stock DP's back on, the CEL will be gone anyways.

2. I am SO SICK AND TIRED of hearing about "back pressure" and the armchair mechanics touting that phrase.