| Rank | Board name and description | Ratio | Posts | Members |
|---|
| 1 | Columbus Racing
Car racing community | 595 | 1542806 | 2592 |
| 2 | Club RSX
Honda RSX fans forums | 253 | 39547793 | 156330 |
| 3 | Track Forum
Racing discussion board | 233 | 2270308 | 9752 |
| 4 | Autoracing.com.br
Brazilian motorsports forum (in portuguese) | 208 | 1553457 | 7486 |
| 5 | Houston imports
Houston import race scene forums | 200 | 11534632 | 57635 |
| 6 | Auto Racing
Brazilian car racing forums | 200 | 1308851 | 6529 |
| 7 | New England Street Riders
Motorcycles forum | 194 | 1031729 | 5328 |
| 8 | BARF
Bay Area Riders Forum | 145 | 3274696 | 22566 |
| 9 | Ford power
Ford cars discussion forums | 138 | 1564265 | 11327 |
| 10 | Corvette Forum
Chevrolet corvette forum | 134 | 39660325 | 295498 |
| 11 | Motor Forum
Dutch motors discussion forums | 122 | 6160039 | 50545 |
| 12 | NASIOC Forums
Forums of the North American Subaru Impreza Owners Club | 116 | 36171198 | 311348 |
| 13 | VW vortex forums
Volkswagen and related car brands discussion boards | 115 | 60695474 | 526883 |
| 14 | Texas Racing Scene
Texas automotive forums | 114 | 549357 | 4829 |
| 15 | New Celica
Toyota Celica discussion forums | 112 | 3592475 | 31948 |
| 16 | Montreal racing
Car racing in Quebec (in french and english) message boards | 107 | 6941539 | 64633 |
| 17 | REVscene.net
Vancouver and Pacific Northwest import modified car community | 101 | 1721316 | 17062 |
| 18 | Clio sport
Renault Clio owners forum | 100 | 991798 | 9933 |
| 19 | Zatzy
Swedish car forum | 98 | 1866121 | 19006 |
| 20 | Racers Den
Car racing forums | 96 | 66563 | 696 |
| 21 | Velocidad Maxima
Car modifications forums (in spanish) | 94 | 607732 | 6442 |
| 22 | Ten Tenths
Motorsports message board | 84 | 3043948 | 36364 |
| 23 | Scoobynet
Subaru Impreza owners community | 82 | 10338458 | 125550 |
| 24 | Ferrari Chat
Ferrari fans and owners community | 72 | 7390977 | 102642 |
| 25 | Tampa Racing
Car racing community | 70 | 6243052 | 88607 |
| 26 | Pelican Parts
Porsche and BMW message boards | 70 | 3255593 | 46386 |
| 27 | Performance forums
Cars and motorbikes performance forums | 67 | 2675856 | 40067 |
| 28 | Focal jet
Ford Focus owners community | 64 | 772099 | 12221 |
| 29 | Bimmerforums
BMW car brand message boards | 59 | 23313585 | 398128 |
| 30 | StreetRace.org
Estonian Streetracing forums | 59 | 665554 | 11216 |
| 31 | CamaroZ28.com
Chevrolet Camaro Z28 discussion forums | 58 | 4982373 | 85986 |
| 32 | Forum Auto
Automotive discussion (in french) | 57 | 24412819 | 427603 |
| 33 | LS1
Chevrolet Camaro message boards | 51 | 2646111 | 51849 |
| 34 | StreetRace.co.uk
Car tuning and racing forum | 49 | 810267 | 16414 |
| 35 | Driving Italia
Italian racing forums | 47 | 530834 | 11328 |
| 36 | RX-7 Club
Mazda RX-7 forums | 46 | 4415016 | 95073 |
| 37 | Boostcruising
Steet cruising and automotive forums | 41 | 5838159 | 140707 |
| 38 | Down Force
Brazilian car racing forum | 41 | 1036588 | 25417 |
| 39 | MTB news
German mountain bike discussion forums | 39 | 9325706 | 237671 |
| 40 | Team BHP
Indian automotive forums | 37 | 2657191 | 71001 |
| 41 | Race Sim Central
Car racing simulations discussion forums | 35 | 3816746 | 130879 |
| 42 | DSM Source
DSM enthusiast community | 34 | 1042800 | 30565 |
| 43 | Third Gen
Chevrolet camaro owners forums | 33 | 5196451 | 158521 |
| 44 | Piston heads
Automotive discussion forums | 30 | 864230 | 29300 |
| 45 | ATV Connection
ATV discussion forums | 28 | 2371815 | 85348 |
| 46 | No Pistons
Mazda RX7 message board | 27 | 810159 | 30127 |
| 47 | Speed TV
Motorsports message boards | 23 | 2527547 | 109643 |
| 48 | RC web
Racing car forums (in Thai) | 23 | 2158030 | 94117 |
| 49 | Acura-cl
Acura enthousiasts message boards | 15 | 871703 | 57390 |
| 50 | Motorsport Forums - discontinued
Car racing and rallying discussion board | 0 | 8459 | 19829 |
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