BLOX Racing 4.0inch Composite Velocity Stack

SKU: BXIM-00307

BLOX Racing 4.0inch Composite Velocity Stack BXIM-00307 Fits 2002-2011 Honda Civic Si Acura RSX K-Series

BLOX Racing 4.0inch composite velocity stack enhances intake airflow on K-series engines. It bolts onto BLOX intake manifolds for 2002-2006 Acura RSX and 2002-2011 Honda Civic Si models. This design channels air smoothly into the plenum for better throttle response and horsepower gains across the RPM range.

Key Features

• Composite Material: High-temperature molded construction resists heat and keeps weight under 4 ounces for reduced engine stress
• 4.0 Inch Diameter: Matches 70mm throttle body inlets on BLOX manifolds to support high-volume airflow without restriction
• Bellmouth Entry: Smooth curved lip eliminates turbulence and accelerates incoming air for improved cylinder filling
• Bolt-On Fitment: Direct attachment to BLOX plenum-style intake manifolds like BXIM-00300 series with included hardware
• Performance Tuning: Increases mid-range torque and top-end power ideal for track or street driven imports

Product Notes

• Pair with BLOX Racing intake manifold for best results on modified K20 or K24 engines
• Inspect throttle body gasket during install to ensure airtight seal
• Packages in foam-lined box measuring 6 x 6 x 4 inches for protection

Installation Notes

• Professional installation recommended.
• Remove stock air inlet cover and align stack with manifold opening
• Uses M6 bolts compatible with BLOX BXIM-00300 BXIM-00301 manifolds no drilling needed

This Part Fits

Year	Make	Model	Submodel
2002-2004	Acura	RSX	Type-S K20A2
2005-2006	Acura	RSX	Type-S K20Z1
2002-2005	Honda	Civic Si	EP3 K20A3
2006-2011	Honda	Civic Si	FA5/FG2 K20Z3

Why Choose BLOX Racing?

• 20 years leading import performance parts for Honda enthusiasts
• Focuses on airflow dynamics tested on dyno and track
• Manufactures in-house for consistent fit and finish quality

Frequently Asked Questions

• Q: Will this fit non-BLOX intake manifolds on K20 engines?
  A: Designed specifically for BLOX plenum manifolds like BXIM-00300. Inlet flange matches 4 inch opening on these units. Adapters may be needed for others.
• Q: What material resists engine bay heat?
  A: Injection-molded high-temp composite plastic withstands 250F degrees without warping or cracking unlike aluminum options.
• Q: How long does install take?
  A: 15-30 minutes with basic hand tools. Bolt directly after removing air inlet. No tuning required for basic setup.

Shipping & Handling

• Method: UPS Ground or USPS Priority Mail
• Availability: In stock – ships same or next business day
• Packaging: 6 x 6 x 4 inch box with protective inserts
• Weight: 0.4 lbs product shipping weight