Home 
Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
Bosch Product Details - Ratings and reviews for bosch (4504) hgr9dqi platinum ir fusion spark plug, pack of 1.
Enlarge View
List Price:
Featured:
Compare:
$5.75
$2.44
Sales Rank: 598
Bosch
Avg. Customer Review: 
Media: Misc.
TODAY'S BEST DEALS
Amazon.com
Price: $5.75
Usually ships in 24 hours
AUTO PARTS 123
Price: $6.14
Usually ships in 1-2 business days
Product Features
Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
- Patented fused iridium and platinum center electrode, sintered into an extended insulator nose, provides exceptional wear resistance and reaches
- 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 set to provide ease of installation - never requires adjustment
- Contains one spark plug
Product Review
Product Description
Boschácombines the best features of their +4 plug with the advantages of iridium.áThe Bosch PlatinumIR Fusionáplug fuses iridium with platinum, combining the superior properties of both materials into a singleáfine wire center electrode.á Additionally this plugáusesásurface air gap technology and 4 yttrium enhanced ground electrodes for both performance and extra long life.áThe fine wireáiridium/platinum center electrode (which isáheat fused into the extended ceramic insulator) reducesáthe voltageánecessary to jump the gap as well as reduces quenching.ááTheá4 ground electrode design not only provides multiple radial spark paths,ábut also the surface air gap designácreates optimal exposure of the air/fuel mixture to the enhanced ignition spark. The combination of an iridium/platinum center electrode and the yttrium -enhancement of the ground electrodes even further extends plug life.áThis plug is designed toágive exceptional performance, reach self cleaning temperature faster for quicker starts, smoother acceleration and increased fuel efficiency.á
Product Details
Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
- Misc.: 0 pages
- Publisher: Bosch
- Label: Bosch
- Studio: Bosch
- Average Customer Review: based on 2 reviews
- Sales Rank in Automotive: #598
Accessories
Click on Product Listings for Details!
Customer Reviews
Avg. Customer Review:
Customer Rating: 
Summary: Good Plugs at Great Price 2010-01-05
Customer Rating: 
Summary: unimpressed 2008-02-09
Comment: They work but not near as well as a cheap ngk. old spark plugs would start with one try when the truck is cold. new spark plugs take two tries when the truck is cold.
You are currently viewing
Bosch - 4504 HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
On installation into my Ford F250 with V10, there is noticeable difference in the throttle response. Engine is more responsive to small throttle changes just above idle, and it seems less throttle is needed to ease away from a stop. There is less burble in the exhaust note. An added plus is that 1st to 2nd gear shift cannot be felt now (used to be more abrupt). Perhaps these plugs are more consistent at firing lean mixtures in newer cars. Note that old plugs removed have gaps still at factory spec.
One caveat - the differences may have resulted with ANY new plugs put in. New plugs with sharp edges at electrodes should start firing at lesser voltages compared with rounded electrodes on well used plugs. The exotic materials used in these plugs may make differences in extended term performance.