Here some shoots of Nismo brochure about R1 & S1 full tuning by Nismo Omori Factoring. These options was very expensive.
At time an official dealer removed the engine from your Skyline GTR and shipped it to Omory for the job. After you received a 450ps engine (R1 version) or 400ps (S1). Very expensive tuning. The price was 1.800.000 yen for R1.
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Nismo R1 and S1 japanease catalog
Category → Nismo R1 and S1 japanease catalog » Cars , magazine , skyline » Toys Japan