NGK Iridium IX Spark Plug Box of 4 (YR55IX)

NGK Iridium IX Spark Plug Box of 4 (YR55IX)

Regular price $37.60 USD
Regular price Sale price $37.60 USD
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NGK7588
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Give us a call to get the best prices and parts for your build. Or, just call us with a cool racing story...either way we're here.

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Spark Plugs
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and...
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Description

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

This Part Fits:

Year Make Model Submodel
1975 Buick Apollo Base
1975 Buick Apollo SR
1975 Chevrolet Bel Air Base
1978 Chevrolet C10 Big Ten
1975,1977-1978 Chevrolet C10 Cheyenne
1975,1977-1978 Chevrolet C10 Custom Deluxe
1975,1977-1978 Chevrolet C10 Scottsdale
1975,1977-1978 Chevrolet C10 Silverado
1975,1977-1978 Chevrolet C10 Suburban Custom Deluxe
1975,1977-1978 Chevrolet C10 Suburban Scottsdale
1975,1977-1978 Chevrolet C10 Suburban Silverado
1975,1977-1978 Chevrolet C20 Cheyenne
1975,1977-1978 Chevrolet C20 Custom Deluxe
1975,1977-1978 Chevrolet C20 Scottsdale
1975,1977-1978 Chevrolet C20 Silverado
1975,1977-1978 Chevrolet C20 Suburban Custom Deluxe
1975,1977-1978 Chevrolet C20 Suburban Scottsdale
1975,1977 Chevrolet C20 Suburban Silverado
1975,1977-1978 Chevrolet C30 Cheyenne
1975,1977-1978 Chevrolet C30 Custom Deluxe
1975,1977-1978 Chevrolet C30 Scottsdale
1975,1977-1978 Chevrolet C30 Silverado
1975 Chevrolet Camaro Base
1975 Chevrolet Camaro LT
1975 Chevrolet Camaro RS
1975 Chevrolet Caprice Classic
1975 Chevrolet Caprice Classic Sport
1975 Chevrolet Caprice Estate Wagon
1975 Chevrolet Chevelle Laguna Type S-3
1975 Chevrolet Chevelle Malibu
1975 Chevrolet Chevelle Malibu Classic
1975 Chevrolet Chevelle Malibu Classic Estate
1975 Chevrolet Corvette Stingray
1975,1978 Chevrolet El Camino Base
1975 Chevrolet El Camino Classic
1978 Chevrolet El Camino Conquista
1975,1978 Chevrolet El Camino SS
1975-1978 Chevrolet G10 Beauville
1975-1978 Chevrolet G10 Chevy Van
1975-1978 Chevrolet G10 Sportvan
1974 Chevrolet G10 Van Base
1974 Chevrolet G10 Van Sportvan
1975-1978 Chevrolet G20 Beauville
1975-1978 Chevrolet G20 Chevy Van
1978 Chevrolet G20 Nomad
1975-1978 Chevrolet G20 Sportvan
1974 Chevrolet G20 Van Base
1974 Chevrolet G20 Van Sportvan
1975-1978 Chevrolet G30 Beauville
1975-1978 Chevrolet G30 Chevy Van
1975-1978 Chevrolet G30 Hi-Cube
1975-1978 Chevrolet G30 Sportvan
1974 Chevrolet G30 Van Base
1974 Chevrolet G30 Van Sportvan
1975 Chevrolet Impala Base
1975 Chevrolet Impala Custom
1975 Chevrolet Impala Sport
1975,1977-1978 Chevrolet K10 Cheyenne
1975,1977-1978 Chevrolet K10 Custom Deluxe
1975,1977-1978 Chevrolet K10 Scottsdale
1975,1977-1978 Chevrolet K10 Silverado
1975,1977-1978 Chevrolet K10 Suburban Custom Deluxe
1975,1977-1978 Chevrolet K10 Suburban Scottsdale
1975,1977 Chevrolet K10 Suburban Silverado
1975,1977-1978 Chevrolet K20 Cheyenne
1975,1977-1978 Chevrolet K20 Custom Deluxe
1975,1977-1978 Chevrolet K20 Scottsdale
1975,1977-1978 Chevrolet K20 Silverado
1975,1977-1978 Chevrolet K20 Suburban Custom Deluxe
1975,1977-1978 Chevrolet K20 Suburban Scottsdale
1975,1977 Chevrolet K20 Suburban Silverado
1977-1978 Chevrolet K30 Cheyenne
1977-1978 Chevrolet K30 Custom Deluxe
1977-1978 Chevrolet K30 Scottsdale
1977-1978 Chevrolet K30 Silverado
1975,1977-1978 Chevrolet K5 Blazer Cheyenne
1975,1977-1978 Chevrolet K5 Blazer Custom Deluxe
1978 Chevrolet K5 Blazer Silverado
1975 Chevrolet Monte Carlo S
1975 Chevrolet Monza 2+2
1975 Chevrolet Monza S
1975 Chevrolet Nova Base
1975 Chevrolet Nova Custom
1975 Chevrolet Nova LN
1975 Chevrolet Nova Police
1975,1977 Chevrolet P10 Base
1975,1977 Chevrolet P10 Step-Van
1975,1977-1978 Chevrolet P20 Base
1975,1977-1978 Chevrolet P20 Step-Van
1975,1977-1978 Chevrolet P30 Base
1975,1977-1978 Chevrolet P30 Step-Van
1975,1977-1978 GMC C15 Base
1977-1978 GMC C15 Heavy Half
1975,1977-1978 GMC C15 High Sierra
1977 GMC C15 Indy Hauler
1975,1977-1978 GMC C15 Sierra Classic
1975,1977-1978 GMC C15 Sierra Grande
1978 GMC C15 Street Coupe
1975,1977-1978 GMC C15 Suburban Base
1975,1977-1978 GMC C15 Suburban High Sierra
1975,1977-1978 GMC C15 Suburban Sierra Classic
1975,1977-1978 GMC C15 Suburban Sierra Grande
1975,1977-1978 GMC C25 Base
1975,1977-1978 GMC C25 High Sierra
1975,1977-1978 GMC C25 Sierra Classic
1975,1977-1978 GMC C25 Sierra Grande
1975,1977-1978 GMC C25 Suburban Base
1975,1977-1978 GMC C25 Suburban High Sierra
1975,1977-1978 GMC C25 Suburban Sierra Classic
1975,1977-1978 GMC C25 Suburban Sierra Grande
1975,1977-1978 GMC C35 Base
1975,1977-1978 GMC C35 High Sierra
1975,1977-1978 GMC C35 Sierra Classic
1975,1977-1978 GMC C35 Sierra Grande
1978 GMC Caballero Base
1978 GMC Caballero Diablo
1978 GMC Caballero Laredo
1975,1977-1978 GMC G15 Rally
1975,1977-1978 GMC G15 Rally STX
1975,1977-1978 GMC G15 Vandura
1974 GMC G15/G1500 Van Rally
1974 GMC G15/G1500 Van Vandura
1975,1977-1978 GMC G25 Rally
1975,1977-1978 GMC G25 Rally STX
1975,1977-1978 GMC G25 Vandura
1974 GMC G25/G2500 Van Rally
1974 GMC G25/G2500 Van Vandura
1975,1977-1978 GMC G35 Magnavan
1977-1978 GMC G35 Rally
1977-1978 GMC G35 Rally Camper Special
1977-1978 GMC G35 Rally STX
1977-1978 GMC G35 Vandura
1977-1978 GMC G35 Vandura Special
1974 GMC G35/G3500 Van Base
1974 GMC G35/G3500 Van Rally
1974 GMC G35/G3500 Van Vandura
1975,1977-1978 GMC Jimmy Base
1975,1977-1978 GMC Jimmy High Sierra
1975,1977-1978 GMC Jimmy Sierra Classic
1975,1977-1978 GMC Jimmy Sierra Grande
1978 GMC Jimmy Street Coupe
1975,1977-1978 GMC K15 Base
1975,1977-1978 GMC K15 High Sierra
1977 GMC K15 Indy Hauler
1975,1977-1978 GMC K15 Sierra Classic
1975,1977-1978 GMC K15 Sierra Grande
1975,1977 GMC K15 Suburban Base
1975,1977 GMC K15 Suburban High Sierra
1975,1977 GMC K15 Suburban Sierra Classic
1975,1977 GMC K15 Suburban Sierra Grande
1975,1977-1978 GMC K25 Base
1975,1977-1978 GMC K25 High Sierra
1975,1977-1978 GMC K25 Sierra Classic
1975,1977-1978 GMC K25 Sierra Grande
1975,1977-1978 GMC K25 Suburban Base
1975,1977-1978 GMC K25 Suburban High Sierra
1975,1977-1978 GMC K25 Suburban Sierra Classic
1975,1977-1978 GMC K25 Suburban Sierra Grande
1977-1978 GMC K35 Base
1977-1978 GMC K35 High Sierra
1977-1978 GMC K35 Sierra Classic
1977-1978 GMC K35 Sierra Grande
1975 GMC P15 Base
1975 GMC P15 Value Van
1975,1977-1978 GMC P25 Base
1975,1977-1978 GMC P25 Value Van
1975,1977-1978 GMC P35 Base
1975,1977-1978 GMC P35 Value Van
1975-1977 GMC Sprint Base
1975-1977 GMC Sprint Classic
1975 GMC Sprint High Sierra
1976 GMC Sprint Sierra Madre Del Sur
1975-1976 GMC Sprint SP
1975 Oldsmobile Cutlass Base
1975 Oldsmobile Cutlass S
1975 Oldsmobile Cutlass Supreme Base
1975 Oldsmobile Omega Base
1975 Oldsmobile Omega Salon
1975 Pontiac Firebird Base
1975 Pontiac Firebird Esprit
1975 Pontiac Grand LeMans Base
1975 Pontiac LeMans Base
1975 Pontiac LeMans Sport
1975 Pontiac Ventura Base
1975 Pontiac Ventura Custom
1975 Pontiac Ventura S
1975 Pontiac Ventura SJ

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Testimonials

Looks like I get to be the first review for these guys. Let me start out by saying that I have had 3 other cars of a similar caliber to my GTR serviced/worked on and upgrades installed at other shops and none took the pride and level of detail that these guys did. I wish I could see all the welds on the downpipes and exhaust because it looked like artwork. Their fabricator made sure to send me daily updates and pictures which was also a big deal to me. For being an out of state experience it made it seem more like they were local to me and that I had known them for longer.

- James Lowe

Took the leap of faith on buying a set of their R35 intakes and downpipes because the price was half of anyone elses plus their car hauls a** at the track. Install went smooth and the power seems to be even better than advertised. Cant wait to get tuned in a few weeks. Their shelf tune honestly has to be 600+ hp as I pulled on a Hellcat last night. I see these guys and gals going a long ways if they can get out there and advertise. Customer service is on point paired with BIGGG savings for the winning combo.

- Luca Harris

Bought a Motec and had these guys build the harness and set it up fully. Track car that received the level of attention and detail of a show car while here. Made me feel at home every time I popped in for a visit and always offered to buy me lunch/dinner. I don’t see me shopping anywhere else as they make you feel like your family.

- Richard Westbrook

Took the leap of faith on buying a set of their R35 intakes and downpipes because the price was half of anyone elses plus their car hauls a** at the track. Install went smooth and the power seems to be even better than advertised. Cant wait to get tuned in a few weeks. Their shelf tune honestly has to be 600+ hp as I pulled on a Hellcat last night. I see these guys and gals going a long ways if they can get out there and advertise. Customer service is on point paired with BIGGG savings for the winning combo.

- Luca Harris

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