NGK R5671A-8 Spark Plug for Sprint 305 Racing Engines, Set of 8

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For aluminum heads flat seat 14mm .708 reach
Spark plug seat and taper both have a gasket
Designed specifically for sprint racing applications

$51.12

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Product Summary

305, Gasket Spark Plug Seat Style, Gasket Seat Taper

For aluminum heads flat seat 14mm .708 reach
Spark plug seat and taper both have a gasket
Designed specifically for sprint racing applications
Core is made from copper and the tip from nickel alloy
Engineered for high-revving, high-compression race crate engines

Comes as a Kit

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Key Specs

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Details

Every NGK spark plug is designed to withstand severe mechanical and thermal shock associated with these high-revving, high-compression race crate engines.

For aluminum heads flat seat 14mm .708 reach
Sprint racing applications
305 engines
Set of 8

Application

Spark Plug Application Chart

Guides & Documents

Performance Spark Plug Buyer’s Guide

Specifications

KEY SPECS
Brand	NGK

GENERAL
Spark Plug Seat Style	Gasket
Seat Taper	Gasket
Spark Plug Reach	.75"
Thread Pitch	14mm
Insulator Type	Non-projected
Resistor	No
Spark Plug Heat Range	8
Core Material	Copper
Tip Material	Nickel Alloy
Wrench Size	5/8"
Sold in Quantity	Kit