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The Moditorium

A high performance automotive resource for parts, how-to's, projects, buyer's guides, technical, events, and more.

Radium's Line of Focus ST/RS Parts - How it Fits into Your Build

The Path To 300whp In Your Focus ST

How to Plan a 2015-2021 WRX Build

The Top 5 Ford Focus ST Mods

Mods Not Likely to Void Your Warranty

10 Best Mods - 10th Gen Civic 1.5T

Using E85 in a Subaru WRX/STI EJ25: A Guide

Does the Subaru WRX and STI Really Need a Catch Can?

3 Port Electronic Boost Control Solenoid: What and Why?

Focus ST Turbo Upgrade - The Ultimate Mod

Why the Cobb AP Should Be Your WRX’s First Modification

How to Build a 400whp Focus ST

14 Easy, Cheap, and Effective Focus ST Mods

Focus ST OEM Short Block vs. Built Motor

5 Great Intake Systems for the 10th Gen Civic Si

Ford Focus ST Exhaust Options

10th Gen Civic Si Exhaust Options

Upgrading Honda Civic Engine Mounts

Should I Upgrade My Focus ST Intercooler?

What should you look for in an Intercooler Core?

Great Parts at Every Price for your Civic Si

Our Favorite Parts at Every Price for your Focus ST.

Need a New Clutch for Your Turbo Honda Civic?

Aftermarket LSD When I Upgrade My Focus ST Clutch?

Best First Mods for the Ford Focus ST

Which Lowering Springs are Best for Your Focus ST?

Lean into Sway Bar and End Link Setup

Should you get an intercooler for your 10th Gen Honda Civic?

Xtreme DI Fueling for Focus ST - Part 1

A Deep Dive Into Turbocharger Boost Control, Wastegates, and BOVs

The Garrett PowerMax: A Perfect OEM+ Turbo Upgrade for the Focus ST?

6 Unforgettable Auto Enthusiast Gift Ideas For 2021

Black Friday 2021: Deal List 11/26-11/29

5 Ways to Mod Your 10th Gen Civic for Under $250

4 Things I Love About the KTuner V2

ACT Clutch Kits Released for 10th Gen Civic 1.5T and Type R

Upgrading to a New Intercooler on our Honda Civic Si - Project FC3

Our 10th Gen Civic Needs a Clutch | Project FC3

Project FC3 Gets a Little Stiffer

Project FC3 Gets a New INTAKE SYSTEM | Great Results, Dyno Proven!

Project FC3 - Completing the Turboback Exhaust Setup On Our 10th Gen Civic Si

Project FC3 - Perrin Rear Motor Mount Insert

Project FC3 Gets a 3 Inch Exhaust - DYNO RESULTS!

Tuning Project FC3 - No Parts, HUGE Gains

Project FC3 Honda Civic Si Gets Wheels, Tires, and Coilovers

Extending the Limits of Your Stock Focus ST Turbocharger

What You Need to Build a Focus ST Engine

Now Introducing... Our New AWD Dyno

All About Focus ST Auxiliary Fueling

When To Build Your Focus ST EcoBoost Engine

The 2018 Tax Return Sale - Coupon Code HERE

Low and Slow - Focus ST Brake and Suspension Upgrades

Ford Focus ST - Performance Introduction

6 Tips for Picking the Best Performance Parts

New Product: Grimmspeed Catback Exhaust for Subaru WRX and STI

GrimmSpeed Exhaust Review - FA20DIT Subaru WRX

New Kid On The Block - 2017 Honda Civic Si TURBO

Cobb Tuning Releases mk7 VW GTI AccessPort

Project Blue Boxer - Part 3: Nothing Too Flashy, Everything Functional

Cobb Tuning FA20DIT WRX Flex Fuel Kit - Exactly What To Expect

Why Your Mazdaspeed 3/6 Still Needs OEM Parts To Go Fast

4 Reasons to Upgrade Your WRX or STI Intercooler

How to Prepare for a Dyno Tune

Project Blue Boxer - Part 2: Exhaust, Brakes, Wheels, Tires, and More Tuning

What Blow Off Valve Should I Run?

Understanding a Dyno Graph.  Peak Numbers Aren’t the Whole Story…

When Is A Turbo Too Big?

Project Blue Boxer - Part 1: Tuning

When Do You Need A Bigger Intake?

The Magic of E85

5 Exhaust System Features To Consider

Detonation vs Pre-Ignition

Free at last! - Cobb AccessPort for VW GTI Mk6

Breaking Down Bushing Stiffness

The Biggest Little Turbo: BNR S4 for Mazdaspeed 3 and 6

Dryflow vs Oiled Air Filters

4 Tips for a Longer Lasting Turbo

Methanol Injection - Risk or Reward?

Anatomy of a Clutch

Short Shifters vs. Short Shift Plates

It's All in the Name: Custom Performance Engineering

Tire Size and Wheel Offset – Decisions, Decisions

ACT Releases Clutch Kits for Focus ST 2.0 EcoBoost

E-Tuning for Dummies

Catalytic Converters and Modifying, Making Sense of It All

Stock MAF vs. Big MAF Housing

Running E85 On Your Mazdaspeed

CP-E Atmosphere Kit Now Available in "Bare Bones" Format for Mazdaspeed 3

Manley releases upgraded pistons and rods for Focus ST, Mustang EcoBoost engines

Bolt-On Power for Your FA20DIT WRX

Fast Subarus, Colorado Roads. Enough Said.

HPFP Internals Upgrade for your Mazdaspeed 3 and 6

MazFest 2013

Invidia Downpipe Installation – 2012 Subaru WRX

Project Juvenile Part 1 – 2013 Ford Focus ST

Revvolution’s Project Subaru BRZ Turbo Build…Get Ready.

Choosing the Right Brake Pad

Precision Turbo and Engine Authorized Dealer!!

Top 10 Subaru WRX Mods Under $150

How to Choose the Right Turbo – Part 1

PJ’s 2013 Ford Focus ST from Michigan

A Look Inside Grimmspeed

State of the Aftermarket: SEMA Show 2015