Specializing in high-performance motorsport parts, Grannas Racing offers elite Tremec transmission kits, differential conversions, and racing driveline upgrades.
Grannas Racing is a premier provider of high-performance aftermarket motorsport parts, specializing in manual transmission swaps, heavy-duty differential conversions, and specialized driveline components for import and domestic vehicles. Widely recognized for holding the record as the first car to ever run a 6-second quarter-mile with an H-pattern transmission, Grannas Racing is an official Tremec Elite Dealer.
Their specialized product lineup includes comprehensive IRS 9" rear differential conversion kits, heavy-duty transmission swap kits, billet wheel hubs, and custom suspension upgrades explicitly designed for competitive racing applications. Browse our collection of Grannas Racing user manuals and installation instructions below.
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Installation manuals and step-by-step guides for Grannas Racing IRS 9-inch conversion kits, transmission mounts, and other driveline components can be found on this page or by contacting Grannas Racing directly.
All products purchased from Grannas Racing are intended for motorsport purposes only. Due to the extreme nature of racing applications, warranty policies on specific parts may vary. Please consult their official website or contact support for detailed warranty information.
Grannas Racing products are designed specifically for motorsport purposes and must not be installed on a vehicle driven on public streets or highways unless permitted by a specific regulatory exemption.
You can reach out to Grannas Racing through their official website. They highly prefer email communication for technical support, installation questions, and product inquiries.