From: http://uk-mkivs.net/forums/p/138886/927184.aspx

"Right to explain the previous post from me, the following is an extract from an email i received a long time ago, answering the KO3s Conundrum. "All 150bhp from 2001 onwards are fitted with a k03 sport regardless of power. The only sport turbos are those with serial numbers ending in 0052 and 0053, Choice of only 3/4 turbo out of a possible dozen, Attached is a table of all the k03 turbos notice the 0052/0053 models (S/T/D). The main way to tell if not by the serial number is by the compressor housing as its 39.5ml apposed to 36ml and the tip inlet is also 2ml bigger." Thanks to Simch for the email all those years ago. Dave"

VAG Part number	Tip turbine	KKK Number	KKK	KKK Dimensions	Serial number	Power PSI	Year	Application
06A 145 704	K03	5303-988-0011		2072GAA/5.88		150	Oct-96	A3, Golf, Oktavia
06A 145 704 S	K03	5303-988-0053		2075EXD/5.88	5304-101-5066	150	May-00	A3, Golf, Bora, Oktavia (USA k03 sport)
06A 145 713 D	K03	5303-988-0052		2075EYD/5.88		180	Jul-01	A3, TT, Golf, Bora, Beetle, Oktavia, Leon, Toledo
06A 145 704 T	K03	5303-988-0052		2075EYD/5.88		180	Sep-00	A3, Golf, Bora, TT (USA)

06A 145 704 L	K03	5303-988-0044		2072GAA/5.88		150	Mar-99	A3, Golf, Bora, Beetle, Leon, Toledo, Oktavia
06A 145 713 B	K03	5303-988-0058		2075EYD/5.88		150	May-00	Beetle (USA)

058 145 703 L	K03	5303-988-0005	K03-005 AK549 24	2072GAA/4.82		150	Apr-95	A4, A6, Passat
058 145 703 H	K03	5303-988-0005		2072GAA/4.82		150	Dec-96	A4, A6, Passat (USA)
058 145 703 E	K03	5303-988-0005		2072GAA/4.82		150	Apr-96	A4, A6, Passat (USA)
058 145 703 C	K03	5303-988-0005	K03-005 95 180	2072GAA/4.82	5304-101-5091	150	Feb-95	A4, A6, Passat (USA)
058 145 703 K	K03	5303-988-0025		2072GAAAA/5.88		150	Jan-99	A4, A6, Passat (USA)
058 145 703 J	K03	5303-988-0029		2072GAAAA/5.88		150	Jan-99	A4, A6, Passat, Superb

06A 145 703 C	K03	5303-988-0022		2072GAA/4.82		150	May-98	Sharan, Alhambra
06A 145 704 H	K03	5303-988-0049		2072GAA/5.88		150	Apr-00	Sharan, Alhambra

06A 145 704 K	K03	5303-988-0045		2072GAA/5.88		156	May-99	Cordoba, Ibiza

06A 145 704 A	K03	5303-988-0026	K03-026 CB5012395	2072GAAAA/5.88	5304-101-5066	180	Feb-99	A3

034 145 703 D	K24	5324-988-7200				315	Jan-94	RS2

078 145 703 M	K04	5304-988-0025				380	Jun-00	RS4
078 145 704 M	K04	5304-988-0026				380	Jun-00	RS4

077 145 703 P	K04	5304-988-0028				450	Jun-02	RS6
077 145 704 K	K04	5304-988-0029				450	Jun-02	RS6

078 145 703 H	K03	5303-988-0016		1870EAA/4.82		230,250,265	Oct-97	S4, Allroad (USA)
078 145 704 H	K03	5303-988-0017		1870EAA/4.82		230,250,265	Oct-97	S4, Allroad (USA)
078 145 701 L	K03					230,250,265	Oct-97	S4, Allroad
078 145 702 L	K03					230,250,265	Oct-97	S4, Allroad
078 145 701 R	K03					230,250,265	Oct-98	S4, Allroad
078 145 702 R	K03					230,250,265	Oct-98	S4, Allroad
078 145 701 S	K03					230,250,265	Oct-98	S4, Allroad
078 145 702 S	K03					230,250,265	Oct-98	S4, Allroad

06A 145 704 M	K04	5304-988-0020	K04-020 BG5010816	2275ECDAA/5.82	5304-101-5078	210.225	Feb-99	S3, TT
06A 145 704 P	K04	5304-988-0022	K04-022 DC5027620			210.225	Dec-99	S3, TT
06A 145 704 Q	K04	5304-988-0023				210.225	Sep-00	S3, TT, Leon Cupra R, Toledo

06A 145 704 B	K03	5303-988-0035		2072GAAA/5.88		180	Aug-98	A3, TT, Golf, Bora

Nadgradnja za vdolžne 1.8T	K04	5304-988-0015			5304-101-50-61D	210 (max.235)	Jul-96	A4, A6, Passat, Superb
Nadgradnja za vdolžne 1.8T	K16	5316-988-6717				240 (max.265)	Mar-96	A4, A6, Passat, Superb

Nadgradnja za prečne 1.8T	K04	5304-950-0001	5304 950 0001; K04-001 CH5018484		5304-101-5066	210 (max.235)		A3, TT, Golf, Bora, Beetle, Oktavia, Leon, Ibiza...