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      07-11-2012, 10:29 PM   #1
First Lieutenant
hetzle's Avatar

Drives: E90 335i
Join Date: Dec 2011
Location: Los Altos, California

iTrader: (0)

HPF exhaust vs. AA exhaust?

Currently stuck between the two!

Differences I've noticed:
-HPF is a single 3.5" pipe from the DP back to dual tips
-HPF uses a single 14" resonator
-HPF uses a flex section (which helps when the engine moves around)
-AA is a dual exhaust from the DP back
-AA uses an x-pipe
-AA uses dual mufflers at the rear

HPF is $1595
AA is $1890

Opinions and soundclips of AA and HPF exhausts on an N55 car would be greatly appreciated!
2011 335i sedan 6MT, Pure Turbo Stage 2, JB4, MHD BEF, AA 4" DP, ER FMIC, AA turbo-back exhaust, ST Coilovers, BMS Intake, UUC DSSR+SSK, ER CP, BMS CDV, BMS OCC, Arkym CF trunk

Last edited by hetzle; 07-12-2012 at 12:49 AM.