Camshafts of s3 come closest to the very popular but extreme weird gt cams
These cams can be reworked to fit in a s4.
or just regrind to gt specs or used as they are.
928105291 3R E1-4
928105292 3R E5-8
928105293 2R A1-4
928105294 1e A5-8
S3's Needed Higher Compression 10: 1 Pistons to compensate for their long duration cams which bleed off intake charge pressure