Just in case you guys are wondering, below is the BorgWarner's K03S turbo's specs which is under the hood of the little Pocong. Unfortunately I couldn't get the K04's to do direct comparison but K03S already using K04's compressor size (a bit smaller than K04 meant for 2.0 Fsi though) and quite frankly upgrading to K04 might not see much gain. I've personally seen dyno chart of 1.8T with K03S outpaces 1.8T with K04 by registering 259whp/436nm but of course but of course the turbo won't last long :)
5303-988-0052 (aka KKK K03S)
Compressor part no. 5304 123 2029
Compressor size code/Geometry K04-2075E
Inducer: 38.1 (75% of exducer)
Exducer: 51
Tip height: 4.4
Blades: 4 long/4 short
Turbine part no. 5303-120-5037
Exducer: 40.34
Inducer: 45
Tip height: 6.8
Blades: 11 long
5303-988-0052 (aka KKK K03S)
Compressor part no. 5304 123 2029
Compressor size code/Geometry K04-2075E
Inducer: 38.1 (75% of exducer)
Exducer: 51
Tip height: 4.4
Blades: 4 long/4 short
Turbine part no. 5303-120-5037
Exducer: 40.34
Inducer: 45
Tip height: 6.8
Blades: 11 long
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