GIAC is a software engineering company with 17 years experience tuning cars. They are known for creating "factory smooth" performance software with exceptional power and reliability. Their software replaces the standard software in your car’s engine control unit. It is programmed to adjust ignition timing, fuel delivery, fuel metering, boost settings, rev limiters, and/or speed limiters to optimize performance and, in some applications, fuel economy. Performance-tuned programs are designed to dramatically increase torque and HP without sacrificing smooth drivability. Many programs are also created to accommodate numerous after market performance modifications. http://www.giacusa.com/about.php
Engine Control Unit
HP
TQ
Price*
VR6 (1992-1995)
6-10
8-12
$200
VR6 (1996-1999)
6-10
8-12
$200
VR6 (1999.5-current)
6-10
10-12
$300
VR6 (1999.5-current) with Cams
15-25
10-20
$400
R32 Mk IV
6-12
8-15
$300
R32 Mk IV with Cams
15-25
10-20
$400
R32 Mk V
15-5
8-15
$350
2 litre (1989-1995) (8-16valve)
6-8
8-10
$200
2 litre (1996-1999)
6-10
8-12
$200
2 litre (1999.5-current)
6-8
6-9
$250
2.5 litre ('05-current)
8-15
12-25
$300
2.0T (2006-current)
18-25
50-85
$500
2.0T TSI (2009)
25-50
70-100
$550
1.9 & 2.0 TDI Mk5 (EDC15 & EDC16)
22-45
50-75
$400
30V 2.8 (1997-1999.5) (a4)
6-8
6-8
$250
30V 2.8 (2000-2001) (a4)
6-8
6-8
$300
30V 3.0 (2002-2005.5) (a4)
5-8
5-8
$300
1.8T (1997-1999.5) (a4)
40-45
45-50
$300
1.8T (2000-2005)
35-55
55-60
$450
1.8T (2000-2005) with K04-01 or K04-15
45-100
60-150
$550
1.8T (2000-2005) with K04-20 or K04-23
75-150
90-150
$650
1.8T Big Turbo Kit custom software (various)
100-300
100-300
$750
1.9 TDI Ml IV
22-45
50-115
$450
2.7T (2000-current)
70-80
80-90
$600
2.7T (2000-current) Stage 3- (w/ RS4 K04 & 5 bar, but no other fueling)
Aftermarket Brands 
