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CNC-Machined SUS303 Stainless Steel Manifold Studs for High-Heat Engine Applications
The BLOBXFL-00310-11 is the BLOX Racing 11-piece stainless steel intake and exhaust manifold stud kit in M10x1.25 thread pitch and 55 mm length. Produced from SUS303 stainless steel on CNC machines to precise thread tolerances, these studs are designed to resist the extreme heat, oxidation, and galvanic corrosion that regularly destroy OEM steel studs in high-temperature engine environments. Each piece in the BLOBXFL-00310-11 kit includes a matching washer and a 12-point hex nut, giving technicians a single-purchase solution for a complete manifold fastener replacement without hunting for individual hardware components.
Key Features
- SUS303 stainless steel construction resists oxidation, galvanic corrosion, and heat damage that destroys OEM carbon steel studs over time
- CNC-machined to precise M10x1.25 thread specification for consistent torque and clean engagement in Honda, Acura, Subaru, and similar platforms
- 55 mm stud length accommodates standard intake and exhaust manifold depths as well as thermal gasket setups on many B, K, H, and F-series applications
- 12-point hex nut design allows wrench access in tight manifold bolt patterns common to compact engine bays
- Each stud paired with a matching washer for a complete hardware installation with no additional hardware sourcing required
- 11-piece kit covers most multi-cylinder inline and V-configuration manifold applications in the M10x1.25 spec
- Stainless steel eliminates the rust seizure that makes OEM studs difficult to remove at service intervals without breaking
Specifications
| Detail | Value |
|---|---|
| Part Number (MPN) | BLOBXFL-00310-11 |
| SKU | BLOBXFL-00310-11 |
| UPC | N/A |
| Brand | BLOX Racing |
| Material | SUS303 Stainless Steel |
| Thread Size | M10 x 1.25 |
| Stud Length | 55 mm |
| Piece Count | 11 |
| Nut Style | 12-Point Hex |
| Includes | Studs, Washers, and 12-Point Hex Nuts |
| Application | Intake and Exhaust Manifold Fasteners |
| Fitment | Universal |
| Prop 65 | No |
What's Included
- 11 x M10x1.25 SUS303 stainless steel manifold studs, 55 mm length
- 11 x Matching stainless steel washers
- 11 x 12-point stainless hex nuts
About BLOX Racing
BLOX Racing is a California-based performance parts manufacturer known for producing precision-machined suspension, drivetrain, and engine hardware primarily for Honda, Acura, and Subaru platforms. Founded on a philosophy of combining motorsport-grade materials with street-use durability, BLOX Racing manufactures its products using modern CNC equipment and rigorous quality standards. The BLOX lineup includes intake manifolds, fuel rails, shift levers, suspension links, and hardware kits popular in the USDM and JDM communities.
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Frequently Asked Questions
What is the BLOBXFL-00310-11?
The BLOBXFL-00310-11 is the BLOX Racing 11-piece M10x1.25 stainless steel manifold stud kit in 55 mm length. Each piece is CNC-machined from SUS303 stainless steel and includes a matching washer and 12-point hex nut. It is designed as a complete fastener replacement for intake and exhaust manifold applications on Honda, Acura, Subaru, and other platforms using M10x1.25 manifold stud specifications.
What thread pitch are these studs?
The BLOBXFL-00310-11 uses an M10 x 1.25 thread pitch. This is the fine-thread specification used on many Japanese performance engine manifold applications including Honda K-series, B-series, and Subaru EJ-series platforms. Verify your OEM stud thread pitch before ordering if you are unsure.
Are these studs compatible with my Honda or Acura?
The M10x1.25 thread pitch and 55 mm length are compatible with a wide range of Honda and Acura intake and exhaust manifold stud applications. BLOX Racing lists this length as appropriate for aftermarket intake manifolds and thermal gasket setups on B, D, F, H, and K-series engines. Verify your OEM stud size before ordering.
Why use SUS303 stainless steel instead of OEM carbon steel?
OEM carbon steel manifold studs are prone to rusting, seizing, and snapping during removal, especially after years of heat cycling in exhaust manifold environments. SUS303 stainless steel resists oxidation and galvanic corrosion, making future removal clean and straightforward even after years of heat exposure without applying heat or risking breakage.
Can I use these studs on an exhaust manifold?
Yes. The BLOBXFL-00310-11 is intended for both intake and exhaust manifold use. SUS303 stainless steel maintains its tensile strength and corrosion resistance at the elevated temperatures present at exhaust manifold mounting points.
How many studs does the BLOBXFL-00310-11 come with?
The kit contains 11 studs, each with a matching washer and 12-point hex nut. The 11-piece count covers most 4-cylinder Honda and Acura B-series, K-series, H-series, and similar applications that use M10x1.25 manifold attachment points.
Do these studs require thread locking compound?
BLOX Racing does not specify a thread lock requirement. However, applying a small amount of anti-seize compound to the cylinder head or block-side threads before installation is recommended by most installers to further prevent corrosion bonding at the seating surface, especially in exhaust manifold applications.
What is the warranty on BLOX Racing hardware?
BLOX Racing products are warranted against manufacturing defects. For warranty claims, contact BLOX Racing customer support directly with the part number and proof of purchase. Racing and competition use is typically excluded from standard warranty coverage.
Installation Instructions
- Remove the existing manifold studs using a stud extractor or double-nut method. Apply penetrating oil if studs are seized and allow adequate soak time before attempting removal.
- Clean the threaded manifold holes with a thread chaser or appropriate tap to remove rust, debris, and old thread-locking compound.
- Apply a thin coat of anti-seize compound to the cylinder head or block-side threads of the new studs if desired for future serviceability.
- Thread each new M10x1.25 BLOBXFL-00310-11 stud into the manifold mounting holes by hand until snug, being careful not to cross-thread.
- Tighten studs to the manifold manufacturer's recommended torque spec using the double-nut method. Do not over-torque into aluminum head threads.
- Install the manifold over the studs, place the included stainless washers, and thread the 12-point hex nuts on by hand.
- Torque the 12-point nuts to the manifold manufacturer specification in a cross-pattern sequence for even gasket seating.
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