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Holley STS Turbo Twin Turbocharger System STS1003

Holley STS Turbo Twin Turbocharger System STS1003
Holley STS Turbo Twin Turbocharger System STS1003Holley STS Turbo Twin Turbocharger System STS1003Holley STS Turbo Twin Turbocharger System STS1003Holley STS Turbo Twin Turbocharger System STS1003Holley STS Turbo Twin Turbocharger System STS1003
$6,119.99 ea
NEWARRIVING SOONEstimated Ship Date 04/06/2023 (If Ordered Today)1 available from HOLLEY PERFORMANCE PRODUCTS as of 03/22/2023
Model: 3992961
Supplier has not provided any fitment data for this product.
[More Info]
STS Turbo overcomes the challenges of traditional installations by mounting the turbos in the rear of the vehicle in place of the stock mufflers (on some vehicles). With turbos instead of mufflers, you can retain stock exhaust manifolds, catalytic converters, mid pipes and have a distinctive performance sound that is sure to turn heads. Relocating the turbos to the rear avoids adding additional heat under your hood and you won't have to worry about clearance or interference issues with belts, pulleys, or accessories.
  • Can Be Mounted Virtually Anywhere
  • And Is The Foundation Of A Great Turbo System
  • Designed To Spool Quickly
  • And Build Boost At A Low RPM While Offering
  • Power Increases Throughout Your Engines Power Range
  • Oil Cooled Journal Bearing Style Turbocharger
  • Offers An Excellent Value
  • High Nickel Alloy Turbine Housings Along
  • With High Strength Aluminum Compressor Housings
  • Giving You The Ability To Build The Boost You Need
Holley Performance Emission Code 3: This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles. The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles: 1965 and older U.S. manufactured California Certified vehicles/1967 and older U.S. manufactured Federally Certified vehicles/1967 and older Foreign manufactured vehicle. The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street. WARNING: It is against the law to install this part on an Emissions Controlled Vehicle. The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles/1968 and newer U.S. manufactured Federally Certified vehicles/1968 and newer Foreign manufactured vehicle
Installation Notes:
Requires pipe kit, Blow off Valve Requires welding and fabrication

About Holley Performance Products

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!


Download Name File Size


Air Filter Included Yes
AR .36
Blow Off Valve Included No
Compressor Housing Outlet 2 inch
Emission Code 3
Engine Size 5.0-6.0L
Hardware Included Yes
Maximum Horsepower Supported (Crankshaft) 650
Outlet Flange V-band
Part Type Turbocharger Kit
Turbine Inlet Flange T3 (2.5”)
Turbine Outlet Flange T-31 (2.5")
Turbocharger Mounting Location Rear
Turbocharger Quantity 2
Wastegate Included Yes
Wiring Harness Included Yes


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Holley STS Turbo Twin Turbocharger System STS1003:
Classic Nova 2023