Click to zoom in
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
Air Filters
Shop automotive air filters and performance intake filters at Black Ops Auto Works for direct-fit air filters, drop-in replacement filters, universal clamp-on filters, cabin air filters, engine breather filters, HVAC filters, pre-filters, velocity stacks and intake filter accessories for cars, trucks, SUVs, Jeeps, muscle cars, diesel trucks, import performance builds and custom intake setups. This Air Filters collection is built for enthusiasts who want cleaner airflow, better filtration, improved engine protection, reusable performance filter options, replacement intake filters and vehicle-specific air filter fitment. Browse air filters for Dodge Charger, Dodge Challenger, Dodge Durango, Jeep Grand Cherokee, Jeep Grand Cherokee Trackhawk, Ram TRX, Chevrolet Camaro, Chevrolet Corvette, Cadillac CT5, Ford Mustang, Ford F-150, Toyota Tacoma, Toyota Tundra, BMW, Honda, Infiniti, Nissan, Porsche and other performance platforms. Shop Automotive Air Filters by Category Find the right air ...
View Air Filters Products
BLOX Racing
BLOX Racing has built a strong following in the import and sport compact community since 2003 by delivering parts that meet or exceed OEM quality standards at prices that make building accessible. Every BLOX product is designed with ISO 9001-certified manufacturing processes and subjected to rigorous testing before release, ensuring fitment and reliability that matches the performance they advertise. Popular Upgrades BLOX Racing intake manifolds and throttle bodies are popular for Honda, Acura, and other sport compact platforms, delivering improved airflow and throttle response over stock components. Suspension components including adjustable end links, sway bars, and pillow ball mounts allow precise handling tuning for street and autocross use. Engine hardware — cam gears, valve train components, and timing chain kits — rounds out the BLOX catalog for builders pushing beyond stock engine parameters. What platforms does BLOX Racing support? BLOX Racing focuses primarily on Honda, Ac...
View BLOX Racing Products
Velocity Stacks
Welcome to our Velocity Stacks collection, where you will find an exclusive range of high-performance products designed to optimize your vehicle's air intake system. Our curated selection is perfect for automotive enthusiasts looking to boost horsepower and efficiency. What Are Velocity Stacks? Velocity stacks are specialized components used in air intake systems to improve airflow and increase engine performance. They are engineered to create a smooth transition of air into the engine, which can lead to: Increased Horsepower: Enhance engine output for better acceleration. Improved Fuel Efficiency: Achieve optimal fuel consumption rates. Enhanced Throttle Response: Experience quicker acceleration and response times. Why Choose Our Velocity Stacks? When you choose our Velocity Stacks, you are selecting products that are: High Quality: Made from durable materials to withstand rigorous conditions. Performance-Driven: Designed to deliver measurable improvements in vehicle per...
View Velocity Stacks ProductsLet customers speak for us
Looks pretty nice
Looks pretty nice, pricing was good and the reinforcement is a big plus.
Randy H.
Black Ops Auto Works
I emailed customer service to inquire about when it would be shipped
I emailed customer service to inquire about when it would be shipped. They checked and emailed me with the answer. Customer service is A1
Ralph J.
Black Ops Auto Works
Installation was easy
Installation was easy. The price is good and it looks great on the truck.
Ralph J.
RHO Small Grille Badge
Looks as good as it fits
Looks as good as it fits,
zachary d.
Seibon 70-73 Datsun 240Z OE Carbon Fiber Hood
Nothing like it
I love it great sound and response
Luis P.
Legmaker Dodge Durango HEMI Short Ram CAI 2011-Present 5.7L
Car totally diferent with the whole kit
Car totally diferent with the whole kit. Ive stood next to wide bodies and my car gets more attention at times . Ive bought the kit twice already.
Ding D.
2015-2023 Dodge Charger Carbon Fiber Wind Splitters
Fantastic emblem! Exactly what I was looking for
Fantastic emblem! Exactly what I was looking for. Great quality emblem.
Jacobus S.
Direct Connection Black Metallic Fender Badge
Worked great for my aftermarket hood on my Chrysler 2023 300C
Worked great for my aftermarket hood on my Chrysler 2023 300C. Thanks
Robert G.
Windshield Washer Squirter Relocation Kit Universal
Easy to install and makes car sound even better
Easy to install and makes car sound even better love the winn
Tracy H.
Legmaker Challenger/Charger Hellcat Demon & Redeye Air Intake
Awesome customer support
Awesome customer support. Had multiple issues with fedex and these guys were excellent in helping me sort everything out. The drop springs are great too! I highly recommend
Anonymous
Swift Spec-R Lowering springs Jeep Grand Cherokee 2011-2021
100/100! perfect CF crafted cold air intake for 6
100/100! perfect CF crafted cold air intake for 6.4 jeep .. even makes my AWE exhaust sound even deeper and you cam here this thing sucking when accelerating even at normal speeds🥶
srt.boizzz
Legmaker 392 TH Short Ram Jeep Grand Cherokee SRT 2012-2021
