\u2630 Shop All Categories\n\n--\nMotorsport\n\n--\nKarting\n\n--\nPerformance\n\n--\nMotorcycle\n\n--\nMX/Off Road\n\n--\nTools/Workshop\n\nSimoni Racing 6 X Black Countersunk Screw Kit 5 x 10mm Kit With Allen Key KV/MO\n\nSimoni Boss Kit Replacement Screw Kits.\nSupplied with Allen Key.\n\nSupplied as a complete set. 27.09.2026, 10:09:18\n\nAbout Us\n\nDelivery\n\nFAQ\n\nReturns\n\nContact Us\n\nDemon Tweeks was established in 1971 to service the needs of the\nmotorsport competitor and our\nprincipals of offering top products, quality, service and rapid availability are as important to\nus today as they were in the very beginning. We are leaders in the supply of race wear,\ncompetition and road tuning parts for cars and bikes. Within a staff totalling over 140 is a\ndedicated sales team servicing upwards of 3000 telephone and online enquiries received every day\nfrom the UK and the rest of the world.\n\nOur impressive 140,000 sq.ft. Superstore and warehousing facility in Wrexham, N.