J
J-W Performance [JWP]
http://www.racewithjw.com
Performance racing transmissions and components
JAZ Products [JAZ]
http://www.jazproducts.com
Racing seats and fuel cells
JBA Performance Exhaust [JBA]
http://www.jbaheaders.com
Performance headers and related components
JE Pistons [JEP]
http://www.jepistons.com
Racing pistons
Jerico [JER]
http://www.jericoperformance.com
Performance transmissions
JET Perfomance Products [JET]
http://www.jetchip.com
Computer chips, modules and power filters
Jiffy-tite [JFT]
http://www.jiffy-tite.com
Fittings
JMS [JMS]
http://www.jmschip.com/
Fuel pump voltage boosters, drive-by-wire throttle response enhancers, Ford ecoboost performance chips and aluminum wheels
Joes Racing Products [JOE]
http://www.joesracing.com
Aluminum racing products
Jones Racing Products [JRP]
http://www.jonesracingproducts.com
Performance Pulleys and Belt Systems
JP Performance [JPP]
http://www.jp.com.au/Performance.html
Performance timing sets