Exhaust Guides
Do Cat-Back Exhausts Actually Add Power?
A cat-back changes the sound and sheds a little weight. The power gain is real but small, and mostly comes down to whether the car is turbocharged.
Catted vs Catless Downpipe: What Actually Changes
One keeps you road-legal, the other is track-only. The difference is a single part, and it decides both the power and the law.
The Exhaust Backpressure Myth
You have heard it in every garage: "engines need backpressure." They don’t. Here is what your engine actually wants, and why the myth refuses to die.
Will Straight Piping Fail the MOT in the UK?
A straight pipe sounds the part, but it walks into two separate MOT failures. Here is exactly where it fails and what stays legal.
Exhaust Drone: What Causes It and How to Fix It
Drone is a low resonant boom at cruising rpm that turns a good-sounding exhaust into a headache on the highway. It has specific causes and specific cures.
Exhaust Headers vs the Stock Manifold: What Actually Changes
A cast manifold and a tubular header do the same job, collecting exhaust from each cylinder, but they are built to very different priorities.
Exhaust Materials: Mild Steel, Stainless, Titanium and What Lasts
The alloy an exhaust is made from decides how long it survives salt and condensation, how much it weighs, and a large part of what it costs.
Resonators and Silencers: How an Exhaust Actually Gets Quiet
Silencing works in two different ways, absorption and reflection, and knowing which box does which explains why deleting one part makes a car boom.