Click to zoom in
Complete the intended engine or vehicle system with this Moroso performance component in the exact configuration identified on this page. Verify every dimension, material, finish, port, thread, quantity, application, and companion-part requirement before ordering.
Key Features
- Mounting Hardware Included: Stainless steel bolts ensure secure attachment without additional parts needed.
- Exact B-Series Fit: CNC machined edges match Honda B16/B17/B18 cylinder head ports perfectly.
- Black Powder Coat Finish: Durable coating resists rust and corrosion for long-term reliability.
- Uses factory bolt pattern. torque to 20-25 ft-lbs with provided hardware.
- Made from 1/4-inch mild steel with black powder coat finish for strength and rust resistance.
- Store exhaust manifold separately in a dry area after installation.
Fitment
| Fitment Status | Fitment Verification Required |
|---|---|
| Required Verification | Confirm the exact engine, chassis or system application, dimensions, interfaces, companion parts, and current Moroso application notes |
Specifications
| Brand | Moroso |
|---|---|
| Manufacturer Part Number | 25174 |
| Product Type | Block Off Plates |
| Fitment Type | Fitment Verification Required |
| Listed Configuration | Honda B-Series Exhaust Block Off Storage Plate |
| GTIN | 084663251740 |
| Condition | New |
What's Included
One new Moroso block off plates identified by manufacturer part number 25174. Hardware, seals, hoses, fittings, wiring, fluids, tools, and companion parts are included only when expressly supplied for this exact part number.
About Moroso
Moroso develops oiling, cooling, ignition, suspension, electrical, drivetrain, wheel, and racing components for automotive performance applications. Selection and installation remain exact-part-number specific.
Related Moroso Products
- Shop all Moroso products
- Moroso Chevy LS Exhaust Block Off Storage Plate - Pair
- Moroso GM LS Swap (w/Rear Sump & Two -10An Fittings) Wet Sump 7qt 6in Baffled Steel Oil Pan
- Moroso GM LS Swap/Early F-Body (w/Rear Sump & Spin-On Oil Filter Adapter) Wet Sump 6in Steel Oil Pan
Frequently Asked Questions
For Moroso 25174, how do I confirm this Moroso part is correct?
Match the manufacturer part number, product function, dimensions, material, finish, ports, threads, quantity, vehicle or system application, and every required companion component.
Is this a complete installation kit?
Only the parts expressly stated in the listing are supplied. Hardware, seals, hoses, fittings, wiring, fluids, tools, and companion parts may be separate.
What should be inspected after installation?
Check every fastener, seal, connection, wire, hose, mounting point, and surrounding clearance. Correct leaks or contact before operating the vehicle and recheck after initial use.
Installation Instructions
Follow the current Moroso instructions and vehicle service information for part number 25174. Verify every interface and clearance, work on a cool and safely supported vehicle, use the specified seals, fluids, fasteners, and torque procedures, inspect for leaks or contact, and recheck the installation after initial use.
Block Off Plates
Block off plates for engine bay service, intake changes and cooling modifications are stocked at Black Ops Auto Works. Shop EGR plates, coolant plugs, PCV block offs, resonator delete parts, intake heater plugs, actuator plugs, storage plates and sealing hardware for Duramax, Cummins, Powerstroke, LS, Honda and Ford projects. Every product is filterable by year, make, model, trim, engine and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 23 block off plates SKUs across fitment, installation, service and performance categories. What This Block Off Plates Collection Covers A block off plate seals or covers an unused port after an approved component change or service procedure. The correct plate matches the engine family, port shape, bolt pattern, material, gasket needs and intended use. EGR and Intake Ports Fitment and Installation EGR and intake related block off parts must match the exact engine and intake configuration. Confirm legal requireme...
View Block Off Plates Products
Engine
Shop automotive engine parts, cooling-system components, oil-system upgrades, ignition parts, pulleys, sensors, gaskets, fuel components, and engine-bay accessories at Black Ops Auto Works. This collection covers vehicle-specific replacement parts, performance upgrades, supporting hardware, and universal components for street cars, trucks, SUVs, Jeeps, diesel vehicles, off-road builds, and motorsport applications. Engine Parts and Performance Components The Engine collection brings together components used throughout the engine, lubrication system, cooling system, ignition system, fuel system, crankcase ventilation, accessory drive, and engine compartment. Available products range from replacement sensors and gaskets to rotating-assembly parts, performance cooling systems, supercharger pulleys, catch cans, cylinder heads, camshafts, intake manifolds, and engine-bay dress-up components. Engine compatibility cannot be determined from vehicle model alone. Confirm the exact year, make, ...
View Engine Products
Engine Block
Engine block parts and internals for HEMI, Hellcat, Trackhawk, TRX, LS, LT, Coyote, EcoBoost, K-Series, VR38DETT, and Cummins diesel builds are stocked at Black Ops Auto Works. Shop main and rod bearings, engine gaskets and gasket kits, engine mounts, block off plates, block heaters, PCV valves, sleeves, engine covers, and complete engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 2,187 engine block SKUs across rotating assembly, sealing, mounting, and engine bay dress-up categories. What This Category Covers The Engine Block collection groups the internal and structural components that make up the bottom end and block assembly of a performance or OEM-replacement engine. Coverage spans bearings for rotating assembly refreshes, gaskets and gasket kits for sealing rebuilds, engine mounts for swap and performance builds, and engine bay dress-up pieces for HEMI, Hellcat, and ...
View Engine Block Products
Moroso
Shop Moroso oiling, cooling, ignition, suspension, electrical, drivetrain, wheel, and racing components by exact manufacturer part number and verified application requirements. Choosing the Correct Moroso Part Match the exact manufacturer part number and product function Confirm every year, make, and model record when vehicle fitment is listed Keep engine, trim, chassis, dimensions, and companion-part requirements in the application check Verify quantity, material, ports, threads, mounting, clearance, and intended use Related Performance Collections All Moroso Products Engine Components Cooling Components Suspension Components Frequently Asked Questions Does an engine family alone guarantee a Moroso part will fit?No. Confirm the exact vehicle or system application, dimensions, sump or mounting position, ports, threads, clearance, and required companion parts. Are Moroso products sold as complete installation kits?Only the parts expressly named on the exact product page are supp...
View Moroso Products