Platinum+4 Spark Plug
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Bosch Platinum+4 Spark Plug

Part No. 4449 Warranty  
$4.99
Quantity  Add To Cart

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The Bosch Platinum+4 spark plug features unique revolutionary firing technology that combines the advantages of surface air gap technology, 4 nickel-yttrium ground electrodes and a heat-fused center electrode with pure platinum to provide optimum engine performance, smoother acceleration and top fuel efficiency.

Product Features:
  • Revolutionary surface air gap firing technology, featuring multiple spark paths, delivers a powerful spark for ultimate engine performance
  • Offers smoother acceleration, top fuel economy and maximum engine power
  • 4 yttrium-enhanced ground electrodes provide optimum access to the air/fuel mixture for the most efficient combustion; yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life
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Electrode Core Material:Platinum
Electrode Tip Material:Platinum
Ground Strap Quantity:4
Insulator Type:Pyranit
Manufacturer Heat Range:9
Resistor:Yes
Shorty Spark Plug:No
Spark Plug Seat Type:Tapered
Tip Configuration:Surface
Type:HGR9BQP

REVIEW SNAPSHOT®

by PowerReviews
BoschPlatinum+4 Spark Plug
 
4.9

(based on 12 reviews)

Ratings Distribution

  • 5 Stars

     

    (11)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (10)
  • Increases power (10)
  • Easy to install (8)
  • Durable (5)

Cons

    Best Uses

    • Everyday driving (11)
    • Replacement (9)
    • Performance driving (6)
    • Restoration (3)
      • Car & Truck:
      • Casual driver (5)
      • Reviewer Profile:
      • Auto enthusiast (5), Casual driver (4)

    Reviewed by 12 customers

    Sort by

    Displaying reviews 1-10

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    5.0

    Great spark plug

    By classic car guy

    from n.c

    About Me Auto Enthusiast

    Verified Buyer

    Pros

    • Easy To Install
    • Improves Engine Efficiency
    • Increases Power

    Cons

    • none

    Best Uses

    • Everyday Driving

    Comments about Bosch Platinum+4 Spark Plug:

    Replaced spark plugs in 1994 p/u with over 200,000 miles,a big difference in performance and power

    Comment on this review(earn points)

     
    4.0

    Great plugs!

    By Jon

    from Colorado Springs, CO

    About Me Auto Enthusiast, Casual Driver

    Ask me a question

    Verified Buyer
    Level 4

    Pros

    • Improves Engine Efficiency

    Cons

      Best Uses

      • Everyday Driving
      • Performance Driving
      • Replacement

      Comments about Bosch Platinum+4 Spark Plug:

      Great plugs! I installed these on my 1994 GMC Jimmy that has been having issues running/idling. Once I replaced the plugs it instantly ran better. These are necessarily the sole reason for that but they definitely help!

      Comment on this review(earn points)

      (2 of 4 customers found this review helpful)

       
      5.0

      Surprised...

      By Hisoner

      from Cripple Creek, GA

      About Me Auto Enthusiast, Casual Driver, Mechanic

      Verified Buyer
      3 or more reviews submitted

      Pros

      • Easy To Install
      • Increases Power

      Cons

        Best Uses

        • Everyday Driving
        • Replacement

        Comments about Bosch Platinum+4 Spark Plug:

        Was surprised about the 4 electrodes. Didn't realize that until I opened the package. They definitely seem to pep up the performance.

        Comment on this review(earn points)

        (5 of 7 customers found this review helpful)

         
        5.0

        good stuff

        By johnny ford

        from bethlehem, pa

        About Me Auto Enthusiast, Casual Driver, Mechanic

        Verified Buyer
        Level 2

        Pros

        • Durable
        • Easy To Install
        • Improves Engine Efficiency
        • Increases Power
        • Lightweight

        Cons

          Best Uses

          • Everyday Driving
          • Performance Driving
          • Replacement
          • Restoration

          Comments about Bosch Platinum+4 Spark Plug:

          i put these plugs in my 94'f-150 4x4 flair side it uped the power and the fuel mileage on the H.O. 5.0L motor i would put these plugs in all my fords

          Comment on this review(earn points)

          (2 of 4 customers found this review helpful)

           
          5.0

          Easy

          By Purple People Eater

          from Katy, TX

          About Me Auto Enthusiast, Casual Driver, Truck Enthusiast

          Verified Buyer
          3 or more reviews submitted

          Pros

          • Durable
          • Easy To Install
          • Increases Power
          • Lightweight

          Cons

            Best Uses

            • Everyday Driving
            • Performance Driving
            • Racing
            • Replacement
            • Restoration

            Comments about Bosch Platinum+4 Spark Plug:

            Perfect!

            Comment on this review(earn points)

            (6 of 8 customers found this review helpful)

             
            5.0

            Perfect, Increased gas milage!!!

            By rnelson71

            from Topeka, KS.

            Verified Buyer
            Helpful Reviewer

            Pros

            • At least 3mpg difference
            • Improves Engine Efficiency

            Cons

            • No Cons

            Best Uses

            • Everyday Driving
            • Improve gas milage
            • Performance Driving

            Comments about Bosch Platinum+4 Spark Plug:

            These plugs were recommended for our 99 cadillac sts, also used them in our ford conversion van, what a difference!!!
            Really helped with gas mileage per gallon, as well as performance!!! Very impressed!

            • Car & Truck:
            • Casual Driver

            Comment on this review(earn points)

            (2 of 4 customers found this review helpful)

             
            5.0

            i would buy this product again

            By brettless

            from dacula, ga

            Verified Buyer
            3 or more reviews submitted

            Pros

            • Durable
            • Easy To Install
            • Improves Engine Efficiency
            • Increases Power

            Cons

              Best Uses

              • Everyday Driving
              • Performance Driving
              • Replacement

              Comments about Bosch Platinum+4 Spark Plug:

              it's my every day driver and seeing if it will help with fuel milage

              • Car & Truck:
              • Truck Enthusiast

              Comment on this review(earn points)

              (3 of 5 customers found this review helpful)

               
              5.0

              Works fine.

              By SC FredV

              from Oates, SC

              Verified Buyer
              Helpful Reviewer

              Pros

              • Easy To Install
              • Improves Engine Efficiency
              • Increases Power

              Cons

                Best Uses

                • Everyday Driving
                • Replacement

                Comments about Bosch Platinum+4 Spark Plug:

                I used them to replace the plugs in my wife's ice cream truck. The engine compartment gets very hot and I want to see how these plugs hold up under the conditions. So far the engine has a lot more power than it had before.

                Comment on this review(earn points)

                (2 of 4 customers found this review helpful)

                 
                5.0

                platinum +4 bosch spark plug

                By Gramps

                from Scipio, indiana

                Verified Buyer
                Level 1

                Pros

                • Durable
                • Easy To Install
                • Improves Engine Efficiency
                • Increases Power
                • Made a big difference

                Cons

                • Non at this time

                Best Uses

                • Everyday Driving
                • Just cruiseing driving
                • Performance Driving
                • Racing
                • Replacement
                • Restoration

                Comments about Bosch Platinum+4 Spark Plug:

                just a good over allk value... For any type of car...

                • Car & Truck:
                • Auto Enthusiast, Casual Driver, Competitive Driver, Mechanic, Truck Enthusiast

                Comment on this review(earn points)

                (3 of 5 customers found this review helpful)

                 
                5.0

                Platinum + 4 are great

                By GWG

                from OKC, OK

                Helpful Reviewer

                Pros

                • Durable
                • Easy To Install
                • Improves Engine Efficiency
                • Increases Power

                Cons

                  Best Uses

                  • Everyday Driving
                  • Replacement

                  Comments about Bosch Platinum+4 Spark Plug:

                  I put these in a 1987 GMC and noticed an immediate improvement, more power and easier starts, I even gained 2 miles more in a tank of gas. That was 100,000 miles ago. I just replaced them with a new set. The old ones could have gone much longer.

                  • Car & Truck:
                  • Casual Driver

                  Comment on this review(earn points)

                  Displaying reviews 1-10

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                  Do you have questions about this product?(earn points for answers!)

                   

                  Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                  6 Questions | 6 Answers
                  Displaying questions 1-6
                  • Q:

                    how good does it run in a 89 mustang
                    Asked on 6/12/2012 by Anonymous from lancaster, Pa

                    1 answer

                    • CUSTOMER CARE

                      A:

                      To help you in a better manner, if you could please include the year, make, model and engine specification of the vehicle and we would be better able to assist you.

                      Answered on 6/15/2012 by Aaron from AAP
                  • Q:

                    The product information says Do Not Gap; Gap is not adjustable. One of the answers here says that the plug must be gapped when installed. Which is correct?
                    Asked on 8/1/2011 by Dave from Arkansas

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Electrode gap is factory set and never requires adjustment during installation.

                      Answered on 8/3/2011 by DIY Daniel from AAP
                  • Q:

                    whts the price?
                    Asked on 5/9/2011 by Anonymous

                    1 answer

                    • CUSTOMER CARE

                      A:

                      For further assistance please feel free to call 1-877-238-2623 and one of our representatives will gladly assist you with any questions or concerns you may have.

                      Answered on 5/17/2011 by DIY Daniel from AAP
                  • Q:

                    are they gauged already?
                    Asked on 4/27/2011 by Anonymous

                    1 answer

                    • CUSTOMER CARE

                      A:

                      No, you need to regap the plugs when installing them.

                      Answered on 5/12/2011 by Just Ask Jacob! from AAP
                  • Q:

                    I bought these plugs and wires 3 years ago when I first got my truck. I was wondering.. How long do you need to wait before changing your plugs again?
                    Asked on 2/1/2011 by Jello from Thornton, Colorado

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Bosch recommends that you follow the replacement interval listed in your vehicle owner’s manual, however we highly recommend that you inspect your spark plugs annually and replace as required, to insure optimum engine performance.

                      Answered on 2/2/2011 by David the Dynamite Parts Guy from AAP
                  • Q:

                    how many come in a box
                    was wondering k thanks
                    Asked on 4/29/2010 by Anonymous

                    1 answer

                    • CUSTOMER CARE

                      A:

                      They come in a package of 1 per package. Type +4 is the model of the spark plug.

                      Answered on 4/29/2010 by Rose from AAP
                  Displaying questions 1-6

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                  Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.