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 Location:  Home » Spark Plugs » Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1  
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Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1

Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1Brand: Bosch
Category: Automotive Parts and Accessories

List Price: $14.33
Buy New: $2.44
as of 3/9/2010 21:58 PST details
You Save: $11.89 (83%)



New (6) from $2.44

Seller: md_auctions
Rating: 3.5 out of 5 stars 2 reviews
Sales Rank: 962

Media: Misc.
Shipping Weight (lbs): 0.1
Dimensions (in): 3.3 x 1 x 0.9

MPN: 4504
Model: 4504
UPC: 028851010481
EAN: 0028851010481
ASIN: B000PL0CNE

Availability: Usually ships in 1-2 business days

Features:
  • 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

Editorial Reviews:

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


Customer Reviews:
5 out of 5 stars Good Plugs at Great Price   January 5, 2010
Philip Lam (California USA)
1 out of 1 found this review helpful

First of all. The Amazon price for this item is 40% of what other big automotive web-retailers charge. Someone is trying to make excess profits.

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.



2 out of 5 stars unimpressed   February 9, 2008
Renae
4 out of 6 found this review helpful

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.

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