Universal Diamond Style Fuel Pump Block Off Plate - F158

Premium CNC Machined Block Off Plate for Electric Fuel Pump Conversions

Universal Compatibility

Fits Any Engine with Diamond Mounting Pattern & 5/16-18 Thread Bolts:

• Buick V6 231 (3.8L): All years, both odd-fire and even-fire engines
• Buick Turbo V6: Grand National, GNX, Turbo T-Type, and all turbocharged models
• AMC 258 (4.2L) I6: Jeep CJ5, CJ7, CJ8 Scrambler (1972-1986)
• AMC Passenger Cars: Concord, Spirit, Eagle, Gremlin, Hornet (1971-1987)
• Pontiac V8 Engines: 350, 400, 455 and other Pontiac V8s with diamond pattern

Vehicle Applications

Jeep Models:

• CJ5 (1966-1983)
• CJ7 (1976-1986)
• CJ8 Scrambler (1981-1986)
• Early CJ6 (1966-1971)

Buick Models:

• Grand National (1984-1987)
• GNX (1987)
• Turbo T-Type models
• Regal, Skylark, Century with V6
• Riviera (1979+)

Pontiac Models:

• Firebird (all years with Pontiac V8)
• Trans Am (all years with Pontiac V8)
• GTO (1964-1974)
• Grand Prix, Bonneville

AMC Models:

• Concord (1978-1983)
• Spirit (1979-1983)
• Eagle (1980-1987)
• Gremlin, Hornet

Product Features

• ✅ CNC Machined from 6061-T6 Aircraft Aluminum
• ✅ Universal Diamond Mounting Pattern
• ✅ Leak-Free Design - No Gasket Required
• ✅ Precision Polished Finish
• ✅ Stainless Steel Hardware Included
• ✅ Made in USA - Idaho Manufactured
• ✅ 20+ Years Proven Performance

Complete Kit Includes

• (1) Precision machined universal block off plate
• (2) 5/16-18 stainless steel socket head cap screws
• Detailed installation instructions
• Technical support

Why Upgrade to Electric Fuel Pump?

Eliminates Common Problems:

• Vapor lock issues
• Inconsistent fuel pressure
• Hard starting when hot
• Fuel pump diaphragm failures

Performance Benefits:

• Reliable fuel delivery at any angle
• Consistent pressure for carburetors
• Ready for fuel injection upgrades
• Improved off-road capability

Technical Specifications

• Part Number: F158
• Material: 6061-T6 Billet Aluminum
• Dimensions: 2-11/16" H × 2-5/8" W × 15/32" Thick
• Weight: 1.8 oz
• Mounting Pattern: Universal Diamond Style
• Thread Size: 5/16-18 (standard)
• Hardware: (2) 5/16-18 Stainless Steel SHCS
• Finish: Machine Polished
• Origin: Made in USA

Installation Notes

Professional Installation Tips:

• Remove mechanical fuel pump completely
• Verify diamond mounting pattern with 5/16-18 threads
• Clean mounting surface thoroughly
• Apply recommended thread sealant (specifications included)
• Torque bolts to 15-20 ft-lbs in cross pattern
• No gasket required - sealant only

Compatible with:

• Weber carburetors
• Holley carburetors
• Rochester carburetors
• TBI fuel injection systems
• EFI conversions
• All electric fuel pump upgrades

IMPORTANT: What This Plate DOES NOT Fit

• ❌ Chevy Engines: Different bolt pattern - requires specific Chevy plates
• ❌ Ford Engines: Different mounting configuration
• ❌ Chrysler/Mopar: Different mounting pattern
• ❌ Engines with 3/8-16 threads: This plate uses 5/16-18 bolts
• ❌ Non-diamond patterns: Round, rectangular, or other mounting shapes

Always verify your engine has the diamond mounting pattern with 5/16-18 threads before ordering!

Quality Guarantee

Mad4Metal Standards:

• CNC machined to aerospace tolerances
• Aircraft-grade 6061-T6 aluminum
• Corrosion resistant finish
• Racing-proven durability
• American engineering and manufacturing

Why Choose Mad4Metal:

• 20+ years in high-performance racing
• Family-owned Idaho business
• Expert technical support
• Premium materials only
• Precision manufacturing

Shipping & Warranty

• Free US Shipping
• Ships within 1-2 business days
• Manufacturing defects covered
• Technical support included
• Satisfaction guaranteed

Frequently Asked Questions

Q: How do I know if this will fit my engine?
A: Check your fuel pump mounting area. You need a diamond-shaped mounting pattern with two bolt holes for 5/16-18 bolts. If your current pump uses 3/8" bolts or a different shaped mounting, this plate will not fit.

Q: Will this fit my Chevy engine?
A: No. Chevy engines use a different bolt pattern. This plate only fits engines with the GM BOP (Buick-Oldsmobile-Pontiac) diamond mounting pattern and AMC engines.

Q: What's the difference between this and your specific engine plates (F109, F169, F170)?
A: This is the same plate! F158 is our universal part number for the diamond-style pattern. The other part numbers are engine-specific marketing for the same physical plate.

Q: Do I need a gasket?
A: No, gasket not required. Use proper thread sealant as detailed in included instructions.

Q: Works with fuel injection?
A: Absolutely! Perfect for TBI, EFI, or any electric fuel pump conversion.

Q: What tools needed?
A: Basic hand tools. Socket for old pump removal, 5/16" hex key for installation.

PROUDLY MADE IN USA - Supporting American Manufacturing