Quote:
Originally Posted by roastbeef
i love these threads and breakdowns, thanks for sharing.
i do have a few questions;
1. does the full Akrapovic Evolution titanium exhaust system delete or replace any catalytic converters and/or trip any check engine lights? (basically, is it cali smog legal)
2. does bmw put up a fight with warranty claims with under drive pulleys?
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1. The full Akrapovic EVO systems will trigger a CEL, a tune or delete-r module is needed to remedy this.
2. While BMW can theoretically challenge
any aftermarket part vs warranty, I have not heard or seen any issues vs warranty denial being contributed to pulleys to date on the S65.
Most times, the dealer doesn't even notice them.
Quote:
Originally Posted by aka_phox
whats the gains with just the pulley and stage 2?
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Here's a detailed thread about the MS UDPs:
Bang for the Buck Mods: Macht Schnell UDPs & Dyno Findings
http://www.m3post.com/forums/showthread.php?t=649151
And another showing the Macht Schnell intake only, as well as with UDPs and the Akrapovic systems on 2 M3s:
Macht Schnell UDP/Stage 2 Intake & Akrapovic Dyno Findings
http://www.m3post.com/forums/showthread.php?t=567651
Hope this helps!