Full Cat-less Milltek Exhaust System - HP Above Stock?

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#11

05-30-2011, 10:42 PM

2wdBlazer

2nd Gear

Join Date: Jan 2006

Location: Sylvania, OH

Posts: 960

Quote:

Originally Posted by ibjokn

No check engine light and I thought the same as you 2wdblazer. I wish there was a method to check if a ECM has been updated.

Does the car feel fast? They are quite underpowered in stock tune and if it feels pretty quick it may be tuned. That is the only way you would have an engine light fix. The ECU's are purchased by vin number so you can call the companies to ask. GIAC does not have a fix for the light so rule them out. I would check APR, REVO and Unitronic. They are the main companies out there.

#12

05-31-2011, 07:01 AM

ibjokn

1st Gear

Thread Starter

Join Date: Feb 2011

Location: Indiana

Posts: 10

It does feel strong and pulls relatively good through the first three gears. Thanks again for the advise. I'll start calling around on ECM flash.

#13

09-23-2012, 03:36 PM

hayache

1st Gear

Join Date: Sep 2012

Posts: 1

Quote:

Originally Posted by esandes

i'd say 10 HP gain. milltek is nice **** so the guy you bought the car from had good taste for quality. you should seriously consider getting the APR stage 2 ECU flash. it is perfect for catless aftermarket exhausts. i think you'll get ~50 HP over stock with that ECU flash and your existing exhaust.

hey guys i am new to this, i just bought a 2005.5 S4 that has a catless milltek exhaust, my check engine light is on. is it safe ? or do i have to get an ecu flash ?