Skunk2 Racing 309-05-0090 Pro Series Hard Anodized 74mm Throttle Body for Acura Honda
- 74mm bore, hard anodized finish
- K20A, K20A2, K20A3 and K20Z1 engines
- 2002-2005 Civic Si, 2002-2006 RSX Base and Type-S
- Forged billet 6061-T6 aluminum body
- Sealed ball bearings, precision machined throttle plate
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A hard anodized billet throttle body for the Honda K20 engines in the Civic Si and RSX. The copy mentions a different bore once, so confirm the size before ordering.
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ASIN: B008M5JLPAModel: 309-05-0090Category: Throttle Bodies
Overview
Sealed ball bearings carry the throttle shaft in this forged billet aluminum body, and a precision machined plate runs in a honed oversized bore. It is made for Honda K20A family engines in the Civic Si and RSX.
A larger throttle body helps a modified engine that is short of airflow, and this one targets naturally aspirated and forced induction K20 builds. On a stock engine the gain is limited. One line of the description gives a different bore size than the title, which is worth a question to the seller.
Who it's for
A tuner building a K20A engine in a Civic Si or RSX will find the application that fits. Owners of other Honda engines, or stock cars, will see little reason to buy it.
Pros and cons
- Forged billet aluminum construction
- Hard anodized finish
- Sealed ball bearings for smooth action
- Honed oversized bore
- Copy mentions a different bore size
- Weight shown is a placeholder
- Box contents not listed
- Limited to K20 engines
Performance notes
A bigger bore reduces restriction at wide open throttle, so gains show on engines that already move more air than stock. The sealed bearings and honed bore are there to keep the throttle action smooth across the range. Peak numbers depend on the rest of the build.
Specifications
| Brand | Skunk2 Racing |
|---|---|
| Model | 309-05-0090 |
| Dimensions & fit | |
| Bore size | 74mm |
| Construction & materials | |
| Finish | Hard anodized |
| Compatibility & installation | |
| Fits | 2002-2005 Civic Si; 2002-2006 RSX Base and Type-S |
| Other details | |
| Material | Forged billet 6061-T6 aluminum |
| Application | Honda K20A, K20A2, K20A3, K20Z1 |
| Bearings | Sealed ball bearings |
| Model number | 309-05-0090 |
| Part number | SKU-309-05-0090 |
Frequently asked questions
Is the Skunk2 309-05-0090 a 70mm or 74mm throttle body?
The title and the opening line of the description say 74mm. A later sentence in the description says 70mm, so treat 74mm as the intended size and confirm with the seller.
Which engines does it fit?
The description names the Honda K20A, K20A2, K20A3 and K20Z1 in the 2002-2005 Civic Si and the 2002-2006 RSX Base and Type-S.
Will it fit a non-Honda engine?
No. The listing names only the Honda K20 engines in those cars.
Is it a bolt-on for a stock car?
The listing says a larger throttle body suits modified engines with higher airflow demands, so a stock engine will see little change.