Originally Posted by P-Town550i
Most have already made the jump to stage 3 before going to stage 4. Stage 3 also includes the Dinan exhaust ($3500). So if you wanted to go true stage 4 from stage 1, the cost breakdown would be:
Dinan exhaust - $3599.00
Dinan intercoolers - $2499.00
Stage 4 software from stage 1 - $900.00
$6998.00 + labor (about 7 hours) to go from stage 1 to stage 4.
LSD would be an additional $3600.00 + labor.
Hmm.. I already have a Dinan Stage 1 and an Eissenman Race exhaust so I figure the Inter-coolers would cost just $2500 +$900 to Stage 4 as you say. Not sure benefit of the LSD yet but looking closely.
Would like to see if anyone has done either of these big upgrades before to a 550i tho.