Vortech Supercharging System w/ V-2 Si-Trim - Polished (1999 Mustang GT 4.6L 2V) 4FL218-018SQ
Polished V-2 Si-Trim Supercharger System for 1999 Mustang GT 4.6L 2V
The Vortech Supercharging System with V-2 Si-Trim (PN 4FL218-018SQ) is a complete, CARB-approved centrifugal supercharger system engineered specifically for the 1999 Ford Mustang GT equipped with the 4.6L 2-valve engine. Featuring a show-quality polished finish, this system delivers proven Vortech performance while retaining excellent drivability, durability, and emissions compliance.
On a stock Mustang GT, this system safely increases output from 260 horsepower to 364 horsepower and torque from 302 lb-ft to 371 lb-ft. Vortech's centrifugal boost curve provides smooth, linear power that builds with RPM - ideal for street-driven modular Mustangs.
V-2 Si-Trim Supercharger Technology
The V-2 Si-Trim centrifugal supercharger is an engine oil-fed unit that utilizes Vortech's SQ (Super Quiet) gear-driven technology for nearly silent operation and long-term reliability. The high-efficiency impeller and housing design, developed in Vortech's supercharger test cell, delivers strong airflow with reduced heat generation.
Integrated oil feed and drain assemblies provide consistent lubrication and cooling under sustained boost, making the V-2 Si-Trim a proven choice for reliable street performance.
Fuel Management & System Integration
This complete system includes a fuel management upgrade designed specifically for stock engine configurations. Vortech supplies calibration and components intended for factory engines using stock exhaust systems or most aftermarket cat-back exhausts.
Important: Vortech does not provide tuning for vehicles equipped with aftermarket throttle bodies, cold air intakes, headers, off-road mid-pipes, or other engine modifications. Modified vehicles will require custom tuning, and not all ECU box codes are supported.
High Output System Option
Vortech also offers a high-output supercharger system featuring a fully integrated air-to-water, dual-pass charge cooler. High-output systems increase horsepower from 260 to 402 and torque from 302 lb-ft to 400 lb-ft, while maintaining a maintenance-free charge cooling design.
Charge-cooled systems require a battery relocation kit (PN 8N150-010, sold separately).
Included Components
- V-2 Si-Trim centrifugal supercharger with engine oil feed and drain
- High-efficiency impeller and housing assembly
- Fuel management upgrade including:
- High-flow fuel pump
- High-capacity fuel injectors
- ECM chip calibration (for supported stock applications)
- OEM-style aluminum supercharger mounting bracket for factory-installed appearance
- High-flow bypass valve for surge-free compressor operation
- Heat-resistant silicone inlet and discharge sleeves
- Premium stainless steel clamps
- All required mounting hardware
Installation Notes
- Estimated installation time: approximately 12 hours
- Professional installation recommended
- Custom tuning required for modified engines or unsupported ECU box codes
Quick Specs
- Manufacturer: Vortech Superchargers
- Part Number: 4FL218-018SQ
- Application: 1999 Ford Mustang GT 4.6L 2V
- Supercharger: V-2 Si-Trim
- Lubrication: Engine oil-fed
- Finish: Polished
- Horsepower Gain: 260 HP to 364 HP (standard system)
- Torque Gain: 302 lb-ft to 371 lb-ft (standard system)
Emissions & CARB Compliance
- CARB compliant complete system
- Smog legal in California
- CARB Executive Order: D-213-17
Additional Information
- Hardware kit PN 4FL100-001 available for spare or replacement supercharger mounting hardware
- Not all ECU box codes are supported by Vortech tuning
- Unsupported ECU code examples: RKN, MDE, PTP, JRX
- We strongly recommend verifying ECU box code prior to purchase
FAQs
- What is the difference between the V-2 and V-3 Si-Trim?
The V-2 Si-Trim uses engine oil feed and drain lines, while the V-3 Si-Trim features self-contained internal lubrication. - Is this system legal for street use in California?
Yes. This complete system is CARB compliant and covered under Executive Order D-213-17.
Fitment
- 1999 Ford Mustang GT 4.6L 2V
Why Buy from Beefcake Racing?
Beefcake Racing is an authorized Vortech Superchargers dealer with extensive experience supporting modular Mustang platforms. Our team can help confirm ECU compatibility, explain system differences, and ensure your polished V-2 Si-Trim setup delivers reliable, street-legal performance.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
