Skip to product information
1 of 1

Perrin Performance

Perrin - Subaru 06-21 - STI Black Junc. Block for Side Feed Fuel Rail w/Pass Through -6 Fittings

Perrin - Subaru 06-21 - STI Black Junc. Block for Side Feed Fuel Rail w/Pass Through -6 Fittings


Regular price $88.00 USD
Regular price $88.00 USD Sale price $88.00 USD
Sale Sold out
Shipping calculated at checkout.


The PERRIN Fuel Rail Junction Block allows you the flexibility of choosing your own fuel lines and fittings to work with your unique setup.


For customers looking for even greater flexibility with their custom builds, look no further than the PERRIN Fuel Rail Junction Block. Choose from fuel rails and junction blocks to create the fuel setup that is perfect for you and your needs.


The PERRIN Fuel Rail Junction Blocks make for a clean transition from OEM rubber hoses to your PERRIN Fuel Rails. Like the PERRIN Fuel Rails, the PERRIN Junction Blocks are threaded for male 9/16-18 fittings (-6 AN), utilizing an O-ring seal.


The PERRIN Fuel Rail Junction Block is threaded for male 9/16-18 fittings, utilizing an O-ring seal. These are the same as a typical -6 AN fitting with an O-ring seal, also referred to as ORB fittings. These fittings are widely available and in all shapes and colors--whatever suits your build.


All PERRIN Junction Blocks come with built-in phenolic spacers. These spacers insulate the junction blocks from the 200°F cylinder heads, this keeps fuel closer to its normal ambient temperature. These spacers reduce the temperature of the fuel upwards of 30°F.


PERRIN Junction Block bodies are precision CNC machined from 6061 billet aluminum with black anodized finish for corrosion protection and a clean looking finish. All ports are marked with "Feed" and "Return" for ease of installation.


Increase horsepower and torque without ECU recalibration or tune! This part is designed and tested to work safely on your vehicle without any tuning required! However, more power can be gained with proper ECU tuning! Confirm any tune or recalibration you add is specific for ALL modifications added to the vehicle.


  • (2) PERRIN Top Feed Junction Block
    (1) M8 x 20 Socket cap screw
    Warranty & Instructions


  • 04-21 Subaru STI
View full details

Collapsible content

Kit Contents