Bosch (4509) HGR9LQI0 9 Platinum IR Fusion Spark Plug, Pack of 1

by Bosch

Product Features

• Fused iridium and platinum center electrode, sintered into an extended insulator nose results in reaching self-cleaning temperature only seconds after starting and provides exceptional wear resistance
• Revolutionary surface air gap firing technology featuring Bosch's unique four ground electrode design delivers the most powerful spark for the most efficient combustion and optimum horsepower without increasing the voltage requirement
• Four yttrium enhanced ground electrodes resist spark plug wear and oxidation for exceptional performance life
• Factory pre-set gap allows for easy installation that never requires adjustment
• Fusion's voltage requirement increases less over time versus other iridium plugs for longer reliable performance of the vehicle's ignition system

Product Details

• Shipping Weight: 1.6 ounces (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000PL2B8S
• Item model number: 4509
• Average Customer Review: 4.3 out of 5 stars  See all reviews (13 customer reviews)
• Amazon Best Sellers Rank: #13,474 in Automotive (See Top 100 in Automotive)
  • #100 in Automotive > Performance Parts & Accessories > Ignition & Electrical > Spark Plugs & Wires > Spark Plugs
• Discontinued by manufacturer: Yes

Product Description

If you're looking for the very latest in spark plug technology, look no further than Bosch Platinum Ir Fusion. Fusion features a patented, fused iridium and platinum center electrode, combined with exclusive surface air gap firing technology to produce a longer, more powerful spark. Its four yttrium-enhanced ground electrode design outperforms OE iridium plugs by significantly reducing gap wear. This means less stress on the ignition system for quicker starts, more efficient fuel combustion, and a longer performance life. In addition, Fusion's voltage requirement increases less over time versus other iridium plugs for longer reliable performance of the vehicle's ignition system.

Customer Reviews

Most Helpful Customer Reviews

6 of 6 people found the following review helpful:

2.0 out of 5 stars BOSCH PLATINUM, September 26, 2010

By 

barbcue "ribman" (San Jose, California United States) - See all my reviews

Amazon Verified Purchase

This review is from: Bosch (4509) HGR9LQI0 9 Platinum IR Fusion Spark Plug, Pack of 1 (Misc.)

As always Bosch products are great. BUT the shipping from this store leaves a lot to be desired!!! We ordered a set of 8. It took 4 shipments to receive all 8 Some were out of the boxes, some were packed in envelopes, some did not have any protective material around the electrodes. NEVER AGAIN!!!

6 of 6 people found the following review helpful:

5.0 out of 5 stars Sweet Product, August 30, 2009

By 

C. Reeves "C.R." (S.F., S.D.) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Bosch (4509) HGR9LQI0 9 Platinum IR Fusion Spark Plug, Pack of 1 (Misc.)

Installed in a '04 2500HD silverado 6.0l gas. Have noticed an increase in fuel effiency. no knocks or pings. i did also change out my wires at the same time.

5 of 5 people found the following review helpful:

5.0 out of 5 stars Another Wise Purchase, August 8, 2010

By 

Magda2016 - See all my reviews

Amazon Verified Purchase

This review is from: Bosch (4509) HGR9LQI0 9 Platinum IR Fusion Spark Plug, Pack of 1 (Misc.)

I saved at least $20 with purchasing four of these items via Amazon.com. Product arrived fast and safe. Hassle-free installation. Definitely worth the money.