Fastman TB
Site Moderator
Joined: Jan 2008
Posts: 8,374
Likes: 28
From: Sioux Falls, SD
Legend
Joined: Jul 2007
Posts: 7,843
Likes: 13
From: DFW, Texas
RE: Fastman TB
Both the 5.2 and 5.9 have the same stock TB. 50mm at top tapered to 48mm at bottom. Also restricted due to fins above TB bores and the stock air hat. The Fastman grinds out the TB bores to 50 or 52mm adds new blades for the correct size and grinds out the resticting fins above the TB bore.