Pipe
Larger/longer pipe
- More bottom-end power
Smaller/shorter pipe/less volume
- More top-end power
Header
Longer header
- More bottom-end power
Shorter header
- More top-end power
Also see our tips on head clearance, fuel, and glow plugs.

1/10 Off-Road Race Tire Chart
2WD, 4WD, and truck tires with every compound, by brand.
Learn how to tune RC car nitro engines
Larger/longer pipe
Smaller/shorter pipe/less volume
Longer header
Shorter header
Also see our tips on head clearance, fuel, and glow plugs.
Best Gear Calculator App
Calculate your ratio, FDR, pill insert geometry, corner weights, and more!

RC Air Filter Setup Guide for 1/8 Off-Road
The Drake explains how to property mount and prep the air filter for 1/8 scale RC racing.

How to Set Up an RC Starter Box
Adam Drake, Mugen factory driver, explains how to set up your starter box including how to ensure the car is perfectly aligned on top for consistent starting and to avoid damaging your engine.

RC Engine Tuning for Low Nitro Fuel
Adam Drake, Mugen Seiki factory driver, offers tuning tips for engines running fuel with 25% or less nitro, a situation more and more common as environmental controls extend to more countries.

How to Break In a Nitro Engine
JQ explains the nitty gritty of why you should break in your engine, what the point is, and why it's perfectly fine for you to do it yourself without hiring an outside service.

Ultimate Guide to Nitro Engine Tuning from JQ Racing
Settle in for this one - it's over an hour, and has great production value (and is hilarious!) But if you want to know how a carb works, how the needle valves work, how to adjust your idle, or anything else involved with nitro tuning, you must check this out.

RC Engine Break-in with Robert Batlle
Robert walks us through all the important aspects of breaking in an engine for RC racing use.