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Top 5 Best Honda Civic SI (9th Gen) Mods For Under $3000

Welcome to our guide on the top 5 best modifications for the Honda Civic SI 9th Generation that won’t break the bank! If you’re a proud owner of this iconic vehicle and want to enhance its performance, style, and overall driving experience without spending a fortune, you’re in the right place. In this blog, we’ll explore five affordable mods that can transform your Civic SI into a true standout on the road, all for under $3000. Let’s dive in and unleash the full potential of your Honda Civic SI!

This is an exceptional example of a tasteful 9th Gen Honda Civic SI featuring Enkei RAIJIN wheels, a lowered stance, and probably some goodies under the hood. Check out @fb6cujo to see more of this 9th Gen SI

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1. Enkei RAIJIN Wheel 18×8.5 5×114.3 +35mm

The RAIJIN is a light weight street wheel designed for the everyday driver but with added MAT technology performance benefits. Named after the Japanese god of thunder, the Raijin is bound to help you bolt through traffic not only with style but with better overall performance.

Having a light weight wheel helps brake more efficiently, helps accelerate quicker and can even help with fuel economy. You’d be surprised how much difference a few pounds makes.

Wheel Specifications:

Wheel Size: 18×8.5

Offset: 35

Hub Bore: 72.6

Bolt Pattern: 5×114.3

Load Rating: 700.363636363636

Finish: Bronze Paint

Notes:

Wheel Specifications:

Wheel Size: 17×8

Offset: 42

Hub Bore: 75

Bolt Pattern: 4×100

Load Rating: 530

Finish: Hyper Silver | Black | Bronze Paint

2. Skunk2 Mega Power RR Exhaust Honda Civic Si 2-Door 12-15

A properly designed exhaust system is critical to engine performance. Skunk2’s 76mm MegaPower RR Exhaust system for the 2012-2015 Civic Si coupe was developed with this in mind and is based off of more than 15 years’ worth of racing experience. 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 a precise fit. The MegaPower RR for the 2012-2015 Civic Si in conjunction with the Skunk2 Alpha Header for the 2012-2015 Civic Si has seen hp gains above 30hp.

Designed for heavily modified naturally aspirated engines as well as for turbocharged applications that require more exhaust flow than Skunk2’s 70mm MegaPower R Exhausts provide, MegaPower RR Exhausts allow engines to breathe more efficiently and produce more power thanks to larger diameter piping. MegaPower RR Exhaust systems were designed for maximum flow and power, featuring oversized tubing and mufflers, which result in a significantly louder tone when compared to other MegaPower systems.

Featuring Japanese-spec, Super N1 styling, MegaPower RR Exhaust systems generate more horsepower by optimizing engine airflow and volume through carefully selected, application-specific tubing lengths and diameters and increased wave scavenging effects for more horsepower. CNC mandrel bending allows for a constant tubing diameter throughout the bend, which results in precise fitment as well as improved exhaust gas flow. Each system is fitted with a resonator, includes stainless steel flanges, and is finished off with a straight-through, low-restriction racing muffler for uninterrupted flow. Each fully polished muffler is mated to a 110mm polished tip with its own acid-etched MegaPower badge and serialized nameplate. A Skunk2 removable silencer and all necessary hardware are also included.

Skunk2’s MegaPower Exhaust systems are based off of the same systems we custom build for our road racing and time attack vehicles. MegaPower Exhaust systems offer more performance, better build-quality, and the ultimate sound when compared to comparably priced systems.

Fitment:

Honda Civic (Si, Si) 12-15

Notes:

76mm/ 3 inch, Bolt-on system; no welding or fabrication necessary.

May be compatible with other trim levels, however, will require basic welding and fabrication.

Due to large packaging size, shipping rates are calculated based on dimensional weight.

May require modification to factory equipment to allow proper installation.

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3. Eibach Springs PRO-KIT Performance Springs (Set of 4 Springs) Acura ILX | Honda Civic 2012-2015

EIBACH High Performance Handling and Aggressive Good Looks. Lower Center of Gravity. Stop Quicker, Corner Faster and get Better MPG! Progressive Spring Design for Excellent Ride Quality. Million-Mile Warranty

Features

Add-On Part: No

Title: EIBACH PRO-KIT Performance Springs

Notes:

Front 1.2 in; Rear 1.2 in;

4. HPS Shortram Air Intake Kit Includes Heat Shield Polish Honda Civic 2012-2015

HPS Performance Air Intake Kits are designed with style and performance in mind. This HPS Performance Air Intake Kit replaces the factory intake and air filter housing with a 2.75″ custom mandrel-bent aluminum tube and heavy duty powder coated heat shield designed to maximize the performance of your vehicle. It includes a reusable high-flow cotton air filter to provide maximum airflow to increase your engine’s output by up to 3.5 horsepower and 4.7 lb-ft. of torque for power you can feel through improved throttle response and acceleration. This kit includes HPS 100% stainless steel T-bolt clamps and a silicone reducer that are engineered to withstand the toughest driving conditions. HPS Performance Air Intake Kits are designed and tested using the latest technology to ensure the best performance and fitment.

Features:

Features 2.75″ mandrel-bent aluminum tubing and reusable high-flow cotton cone air filter to optimize air flow for improved performance.

Heavy duty powder coated steel heat shield to keep IAT’s at bay.

Increase 3.5 horsepower and 4.7 lb-ft. of torque for faster acceleration and better throttle response.

Gives your 9th gen Honda Civic a fresh look and an improved induction tone.

Easy bolt-on installation using simple hand tools.

Specifications:

Product Type: Performance Air Intake

Series: 827 Series

Color: Polished

Vehicle Type: Sport Compact

Tubing Material: Aluminum

Air Filter Type: Cone

Replacement Air Filter SKU: HPS-4275

Includes Heat Shield

KTUNER ECU Flash with Touchscreen Device V2 Honda Civic Si 2012-2015

The KTunerFlash V2 Unit is the new All-In-One solution from KTuner for your Honda Civic Si. This tool allows you to flash your ECU to a high performance tuning map as well as revert back to stock. In addition, KTuner also allows full access to software for those that want to play with custom tuning themselves. With their dyno proven maps, easy to use flashing device, and ability to customize, the KTuner flashing tool is an amazing product for you!

What tunes will be included?

Stage 1 +16 hp | +8 ft/lbs:

Improved throttle response

Improved low-end and midrange torque

Producing a much more sporty feel and drivability

How does the KTuner Touchscreen Work?

The KTunerFlash V2 features a 5″ touchscreen display that can show essential sensor data in real-time as a digital dash display. Though it’s meant as a handheld a simple Dual-T bracket can be added to allow mounting on a variety of inexpensive Dual-T mounts. Through a simple to use touch interface you can choose between different layouts, multiple data items, and even color options on layouts that support color changes.

Via full integration with our KTuner Tuning Software you are able to load the factory tune and multiple custom tunes to the KTunerFlash V2 allowing you to switch tunes without the need for a laptop. Easily flash back to factory with the touch of the screen. If you’re making quick changes or on the dyno you can also flash through the KTunerFlash V2 without having to upload the tune first.

5 Programmable LEDs can be set to show any combination of colors (RGB) and even allow for fading between a start and end color based on your settings. Customizable intensity settings for each breakpoint allow you to fade in or out at your desired breakpoints. Warnings allow an LED to flash rapidly to easily grab your attention. This can be used for shiftlights, an overheat warning, overboost warning, and other options.

KTunerFlash V2 features On Board Logging With Programmable On/Off Parameters for recording datalogs without a laptop! We allow up to 1000 datalogs to be recorded with no limit on length, so you’ll never miss a beat. Quickly enable or disable on board logging from the menu and once your parameters are met it will record all essential data for later review.

KTunerFlash V2 has built-in bluetooth integration. With a supporting app, like TunerView for Android ($5), you are also able to add additional gauge integration for real-time data display and more. The TunerView app allows you to use your Android device as a video camera and overlay real-time data from the KTunerFlash V2.

About the KTuner Tuning Software:

The KTuner software is a tabbed layout including a drop down list of parameters. This allows easy maneuvering around parameters and tuning layouts. Free to Download Here.

Product Features:

5″ Touch Screen Display.

Real-Time data display with multiple layouts.

Easy to navigate menu system for settings.

Store multiple tunes, including factory. Flash saved tunes without the need for a laptop.

Note: Tunes are still created with the KTuner PC software.

On Board Logging, record datalogs without the need for a laptop.

5 Programmable LEDs (RGB) for shift lights, warnings, etc.

Bluetooth connectivity for peripherals and the TunerView Android app.

This unit is locked to one ECU and allows you to alter the settings in your ECU.

Return to factory at any time and unlock the unit to resell.

This allows datalogging and reflashing right over your factory OBD2 port!