These are all the upgrade parts that will strengthen your Truck and make it more durable, it excludes things like Electronics, Radio Systems and Batteries/Chargers


Bumper's

If you want to upgrade your bumpers, there is rely only one choice that makes sense, that is RPM.
RPM Front Bumper $9.95
RPM Rear Bumper $8.95

Caster's and Carrier's

As for Caster Blocks, just go with Traxxas:
Traxxas Casters $18.95

And then for Carriers it is mixed, some people like Aluminum, and others like Nylon, I prefer Nylon, so I have RPM Carriers all round, but if you want Aluminum, go with STRC, Traxxas make good ones as well, but you might not feel like spent double for them:
Front RPM Carriers $6.95
Rear RPM Carriers $6.95

Front STRC Carriers $16.99
Rear STRC Carriers $14.95
Rear STRC Carriers with 1° Toe In $19.49

A-Arm's

For A-Arm's the best ones are RPM as well:
Front A-Arms $8.95
Rear A-Arms $8.95

Shock's

As for Shock's, with their Titanium Shock shafts and Aluminum body's Traxxas's Big Bores win out:
Full set of Bog Bores with Springs $49.99
Front Big Bores $23.95
Rear Big Bores $24.95

Gear's

32p Gears, there are several brands that make them, I just get the Traxxas Pinion's and Spur's and like them a lot, but some other people like the Robinson Racing Pinions:
Traxxas 32p Pinions $2.79-2.99
Traxxas 32p Spurs $2.59

Robinson Racing 32p Pinions $2.95

Bulkhead

There aren't that many choices when it comes to bulkheads, so I would just stick to an STRC or FLM bulkhead:
STRC Bulkhead 21.95

FLM Bulkhead 29.95

Shock Tower's

For Shock Towers, I would just go with RPM (I am a big RPM fan), but some people complain about them giving too much flex, so if you want Aluminum Tower's go with or STRC or FLM:
Front RPM Shock Tower $5.95
Rear RPM Shock Tower $6.95

Front STRC Shock Tower $16.95
Rear STRC Shock Tower $19.95

FLM Front Shock Tower $15.00
FLM Rear Shock Tower $24.00

Bellcrank

If you want to get an Aluminum Bellcrank to stiffen up your steering, get a Traxxas or STRC, I have heard the STRC Bellcrank has less slop:
Traxxas Bellcrank $24.99

STRC Bellcrank $26.99

Transmission Case

If you want to get an Aluminum Transmission Case, the best one made is the FLM Case, but it's $60.  So if you are willing to settle for the second best, the GH Case is great, and it's only $35.99, it's the one I have:
Transmission Case with 1deg toe in $54.95
Transmission Case with 4deg toe in $60.00

GH Transmission Case Blue $35.99
GH Transmission Case Silver $35.99

Chassis

If you race you will need to convert over to the STRC LCG setup, don't worry, nothing but your chassis changes, and all your current parts and electronics will work fine with everything, it just lowers your COG (Center Of Gravity).  You will need the LCG Kit, a Rustler upper and lower chassis, and the Rustler battery hold down kit: