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Bosch Platinum+4 Spark Plugs 4428

Spark Plug, Platinum +4, Tapered Seat, 14mm Thread, .708 in. Reach, Resistor, Each

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Manufacturer's Part Number: 4428
Part Type: Spark Plugs
Summit Racing Part Number: BCH-4428

UPC: 00028851019637
Shorty Spark Plug: No
Resistor: Yes
Manufacturer Heat Range: 8
Electrode Core Material: Copper
Electrode Tip Material: Platinum
Spark Plug Thread Size: 14mm
Spark Plug Reach: 0.708 in.
Spark Plug Seat Style: Tapered
Wrench Diameter: 5/8 in.
Ground Strap Quantity: Four
Quantity: Sold individually.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

If you require the best in performance and the longest performance life, Platinum+4 is the spark plug for you. Platinum+4's unique revolutionary firing technology combines the advantages of surface air-gap technology, four ground electrodes, and a heat-fused center electrode with more pure platinum, to create the most powerful spark you can buy. Bosch Platinum+4 spark plugs provide optimum access to the air/fuel mixture, for the most efficient combustion and a longer performance life.

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Most Helpful Reviews Review this Product

3 Customer Reviews for Bosch Automotive 4428 - Bosch Platinum+4 Spark Plugs

Average Customer Review

5 Star

(3)

4 Star

(0)

3 Star

(0)

2 Star

(0)

1 Star

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very happy

Summit RacingSummit Racing Verified Purchase

after using +4 spark plugs i will never go back to the single. i can feel the difference right off the bat with these. very happy with the performance

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Reviewer: TRISH from AZ

Date: May 21, 2014

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Bosch Platinum+4 Spark Plugs

Summit RacingSummit Racing Verified Purchase

Vehicle runs well with these plugs installed as they came in the boxes, no gapping needed. Good value on top of the ease of installation.

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Reviewer: STEVE from MS

Date: May 12, 2014

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Better than expected

Summit RacingSummit Racing Verified Purchase

I could feeling the power increase and a smoother ideal. Great product!

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Reviewer: SHAWN from AL

Date: May 03, 2014

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Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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