Accel "U-Groove" 8199 plugs are the best choice for high performance applications
Shorty, U-Groove, Tapered Seat, 14mm Thread, .460 in. Reach, Projected Tip
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Shorty Race Plug .035 Nomial Gap Each 14mm Thread 3/4 Reach 5/8 Hex Gasket Seat - Projected Tip
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Shorty Resistor Race Plug .035 Nomial Gap Each 14mm Thread .460 Reach 5/8 Hex Tapered Seat - Projected Tip
ACCEL U-Groove performance spark plugs produce a larger spark for more power at high RPMs. Improves throttle response & fuel economy, less fouling.
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U-Groove Spark Plug; Header Plug; Resistor; Shorty Plug For Headers; Champion RC8/RC9/RC10 Heat Ranges;
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Application: Shorty Spark plug, U-Groove, Tapered Seat, 14mm Thread, .460 in. Reach, Projected Tip, Resistor, Header spark plug; Resistor;
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Application: Shorty Resistor Version of 111-137
.035 Nomial Gap Each 14mm Thread 3/8 Reach 13/16 Hex Gasket Seat - Projected Tip U-Groove Spark Plug; Header Plug; Resistor; Shorty Plug For Headers;
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