Interesting. They seem to have some deal with ARH to produce longtubes. Apparently some of the best ones on the market for the C63.
Seems like most of the faster cars are running their headers and tune.
Conflicted for now...
Quickest C63 AMG (Naturally Aspirated)
01: 10.789 @ 131.08 MPH (1.587 60') - dodger63, 2010 C63 (Maryland Intl. Raceway, MD USA) - Timeslip
Mods: MHP V4 Tune (100 Octane), MHP Headers, MHP Exhaust, evosport Rotors, KW V3 Coilovers, Braille Battery, CCW Skinnies, 17" Hoosier DRs, Sparco Evo 3 Seat, CF Hood/Trunk
02: 10.911 @ 127.68 MPH (1.620 60') - Dads C63, 2009 C63 (Maryland Intl. Raceway, MD USA) - Timeslip
Mods: MHP V4 Tune (100 Octane), MHP Headers, MHP Exhaust, MHP Heads, RENNtech Airbox, evosport Rotors, Braille Battery, HRE Skinnies, 17" Hoosier DRs, Technocraft Seat, CF Hood/Roof/Trunk
03: 11.150 @ 125.39 MPH (1.763 60') - SALES@OETUNING, 2011 C63 (Sacramento Raceway, CA USA) - Timeslip
Mods: OE Tuning Stg 2 Tune (91 Octane), Gintani Headers, Gintani Exhaust, 18" Nitto DRs
04: 11.199 @ 125.51 MPH (1.660 60') - mthis, 2008 C63 (Atco Raceway, NJ USA) - Timeslip
Mods: MHP V3 Tune (93 Octane), MHP Headers, 18" Nitto DRs
05: 11.415 @ 123.24 MPH (1.720 60') - PetroC63, 2010 C63 (Atco Raceway, NJ USA) - Timeslip
Mods: MHP V3 Tune (93 Octane), MBH Headers, RENNtech Airbox, 18" Nitto DRs, CF Hood/Trunk
06: 11.463 @ 122.43 MPH (1.769 60') - 2010c63amg, 2010 C63 (Maryland Intl. Raceway, MD USA) - Timeslip & Video
Mods: MHP V3 Tune (93 Octane), MHP Headers, CCW Skinnies, 18" MT DRs
Read more: http://mbworld.org/forums/c63-amg-w204/382912-official-mbworld-org-quickest-c63-1-4-mile-list-post-your-timeslips-here.html#ixzz3U8KpnrhB