Thanks, Learn something new everyday. It's my first SC MB. Anyone out there with 'real world' experience with these mods?? Suggested exhaust to go with this?
I have the Johnson CM30 I/C pump and I am very happy with it. My bosch I/C pump had failed at 71K miles. Anthony can comment better, but I think the pump he is referring to is an even higher flow Johnson Pump, maybe the CM90. Either way, I would definitely recommend putting in a Johnson I/C pump.
I deleted my resonator, and like the more "snarly" deep exhaust note than stock. Other exhaust mods are pricey for the HP gained. I put on green air filters, replacing dirty OEM filters and noticed MPG improvement and maybe some acceleration benefits. If you have clean OEM airfilters, the HP gains from greens are probably hard to notice.
I haven't done any other performance mods yet, but I would do the intake, pulley(s) and ECU tune before spending money on the exhaust, beyond a resonator delete.
Also, I am forcing my car to lose weight: Resonator delete saves about 20 lbs, I have a 14 lb battery on order and I went to a wheel/tire combo that is over 40 lbs lighter than the stock AMG set-up (remember that is rotating, unsprung mass, so it counts more just removing "dead weight". Even without the battery, I can really feel a improvement in hard acceleration in 2nd and 3rd gear. No doubt the lighter wheels and tires would benefit hard 4th and 5th gear acceleration too, but the speeds are already pretty high nearing redline in third, so I don't have experience keeping it WOT through 3rd into 4th and 5th.