OS Giken close-ratio geaset for Mazda RX7 FD3S 3-speed OS giken close ratio gearset for FD3S type R15M-D gearbox, 3-gear kit including input shaft $3,600.00 Qty : Share with a friend Add Review Ask a Question < > Product Description Reviews (0) (View All) Questions (View All) OS Giken close-ratio gearsets offer greatly increased gear strength, along with closer gear ratios to suit racing applications. The retention of normal synchromesh parts and a helical gear design means the gears are still almost as quiet as a standard gearset, so this is an excellent upgrade for street-driven vehicles too. OS Giken ratios: 2.714, 1.742, 1.267 Standard ratios: 3.483, 2.015, 1.391, 1.000, 0.806 There are no reviews for this product. There are no questions asked for this product. Similar Products OS Giken close-ratio geaset for Mazda RX7 FD3S 3-speed $3,600.00 $3,600.00 More Details... OS Giken close-ratio geaset for Mazda RX7 FC3S 3-speed $3,600.00 $3,600.00 More Details... OS Giken close-ratio geaset for Skyline, GT-R and Z32 $4,960.00 $4,960.00 More Details... OS Giken close-ratio geaset for S14 5-speed $4,990.00 $4,960.00 More Details... Ok

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