N-Tech Engineering

http://www.n-tech.net

Performance Products for 1st, 2nd, and 3rd gen Rx-7s
Good source for an inexpensive & well made downpipe

Mostly Mazda Racing

http://www.mostlymazda.com

Performance Products for 3rd gen Rx-7s mostly
These are extremely nice people to deal with

Mazda Auto Recycling

http://www.mazdarecycling.com

Used parts for 1st, 2nd, and 3rd gen Rx-7s

MazdaTrix

http://www.mazdatrix.com

Performance Products for 1st, 2nd, and 3rd gen Rx-7s
They also carry a good deal of stock Mazda parts

Mazda Gallery

http://www.gallery-group.com/parts/Default.htm

This is a Mazda dealership that will sell you stock parts at a 20% discount
1-800-339-5767

Racing Beat

http://www.racingbeat.com

Performance Products for 1st, 2nd, and 3rd gen Rx-7s
These guys have been in the business for a long time

RD Enterprises

http://www.shox.com

This place has great prices on suspension components

Cork Sport Mazda Performance

http://www.corksport.com

Mazda performance products
These guys also have a good deal on a strut tower brace for 3rd gens

The Tire Rack

http://www.tirerack.com

Usually have good prices on performance tires

Tri-Point Engineering

http://silverstone.fortunecity.com/brabham/261/index.html

Performance products for 1st, 2nd, and 3rd gen Rx-7s
They have an inexpensive aluminum air separator tank replacement

Pegasus Auto Racing Supplies

http://www.execpc.com/~pegasus/index.html

Good source for general parts... like Hawk brake pads

Derek Vanditmars

http://home.iSTAR.ca/~dvandit/turbocharger.htm

Excellent page for troubleshooting 3rd gen twin turbo problems

Max Cooper

http://www.maxcooper.com/rx7/how-to/hose/tools_materials.htm

Excellent information on silicon vacuum hose replacement for 3rd gens

Steve Cirian

http://www.scuderiaciriani.com/rx7/index.html

Tons of great info on 3rd gen Rx-7s

Rob Robinette

http://robrobinette.com/

Lots of great how-tos for 3rd gen Rx-7s

Motor Oil Overview

http://www.vtr.org/maintain/oil-overview.html

Good article on the attributes/properties of motor oil

Solo II Novice Handbook

http://www.tirerack.com/features/solo2/handbook.htm

Good information for novice autocrossers