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Bolt-on Buyer’s Guide

Let your car breathe freely with these easy-to-install power-adders.

When the decision is made to begin modifying that fancy new (or older) car you just bought, there’s a logical progression. The first and easiest way to get more power and a more aggressive sound from your vehicle is by freeing up the restrictive factory intake and exhaust systems by installing high-flowing aftermarket pieces. Easy breathing is the best way to make power, regardless of how modest or intense your intentions are, so why not start with one of the many featured products in this guide to uncork extra horsepower from your ride?

A Spec Products
EVO VIII & IX cat delete
By replacing the restrictive factory catalytic converter with a titanium cat-delete pipe from A Spec Products, it’s possible to create a fully free-flowing exhaust system for your EVO VIII or IX. Make sure to check your local laws regarding emissions equipment because these pipes may not be legal for street use in your state.

A Spec Products
Universal L-Spec muffler
A Spec Products’ universal L-Spec muffler features a 3-inch inlet and an 8.5-inch extra-long tip. These free-flowing mufflers will aid in clearance if your car has an aggressive rear aero kit, as well as increase performance when compared to restrictive factory muffler specifications.

BLOX Racing
Universal stainless muffler
Universal high-performance mufflers from BLOX Racing are fully polished and feature a single 102mm tip. Each muffler comes with a bolt-in silencer that doesn’t restrict exhaust flow. This is a great choice for those looking to replace their existing stock or aftermarket unit, or for those who don’t have an exhaust application readily available.

BLOX Racing
Aluminum velocity stacks
BLOX Racing velocity stacks incorporate race-proven intake technology into a product designed for daily driven vehicles. These velocity stacks are designed to optimize and maximize airflow rates entering the induction system and are ideal for naturally aspirated and turbocharged applications. They’re available in 2.5-, 3- and 4-inch sizes and are made out of composite nylon or anodized billet aluminum.

Legalis R exhaust system
The Legalis R model is perfect for the street because of its oval-type canister and provides an increase in power throughout the rpm range. The RM-01A is great for an enthusiast looking for increased horsepower and weight reduction while maintaining good throttle response, and the Super Ti model provides the most power gain and greatest weight reduction. All Fujitsubo exhaust systems are made in Japan using the latest technology and highest quality materials.

Lexus IS-F intake system
This new system draws air through a K&N high-flow air filter that increases airflow and never needs to be replaced. Protecting the titanium-top, cone-shaped air filter and isolating it from engine heat is a powdercoated heat shield that replaces the stock airbox.

Agency Power
Electronic valve-controlled exhaust
The Agency Power GT-R exhaust gives the user the ability to control the performance and sound of the exhaust with the push of a button. Valves mounted near the muffler allow exhaust gases to either pass straight through for performance and a louder sound, or be diverted into the muffler for a quieter sound.

Honda Civic Si MegaPower RR exhaust
Based off of the same systems Skunk2 designs for its championship-winning race cars, the 76mm MegaPower RR exhaust for the ’06–11 Civic Si was designed for turbocharged engines, as well as for heavily modified NA applications that require significant exhaust flow. Dyno-proven for maximum horsepower, MegaPower RR systems are constructed of T-304 stainless steel, are robotically TIG-welded and feature CNC mandrel bends for precise fitment.

AMS Performance
R35 GT-R Alpha induction kit
AMS has eliminated driveability issues often seen when running high horsepower on the R35 Nissan GT-R by converting the stock induction system to a blow-through MAF system. This conversion provides improved measurement of airflow entering the engine and allows you to run an atmospheric vent blow-off valve without the throttle issues that commonly arise on the standard draw-through MAF system. This system has been proven effective up to 1,400 hp.

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