Overall Rating
3.8 out of 5
3.8 out of 5
Open Ratings Snapshot
Rating breakdown 67 reviews
5 Stars
35
4 Stars
12
3 Stars
4
2 Stars
2
1 Star
14
Ease of Use/Installation
4.8 out of 5
4.8 out of 5
Quality/Construction
4.9 out of 5
4.9 out of 5
50 of 67(75%)reviewers would recommend this product to a friend.
Product ReviewsWrite a review
Overall Rating
5 out of 5
5 out of 5
great product
February 22, 2015
gjackson
Ease of Use/Installation
5 out of 5
5 out of 5
Quality/Construction
5 out of 5
5 out of 5
" have been using these plugs for years in all of my non-overhead cammed engine, they just dont seem to agree with the overhead engines but are excellent in anything else. always have saw slight fuel milage gains and noticable throttle responce. i do think that its odd that the plugs are different prices on this site for different part numbers, whereas on other sights, every plug is the exact same price ($5.99) "
0points
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Overall Rating
5 out of 5
5 out of 5
Very good plugs
January 13, 2015
Mick1J
Location: Central, Minneapolis, MN, USA
How often do you shop at JC Whitney.com? Multiple Times a Year
Ease of Use/Installation
5 out of 5
5 out of 5
Quality/Construction
5 out of 5
5 out of 5
" I like the design and results from Diamond Fire plugs. Pre set gap and great design make them good purchase. Improved performance and smooth running engine was exactly what I was looking for. The plugs did both. "
0points
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Overall Rating
5 out of 5
5 out of 5
I am impressed
November 15, 2014
Firepro
Location: Dexter, ME, USA
How often do you shop at JC Whitney.com? Multiple Times a Year
Ease of Use/Installation
5 out of 5
5 out of 5
Quality/Construction
5 out of 5
5 out of 5
" Not much for gimmicks, but I think these plug got me about 2 mpg, and a little more power "
-1point
1out of 3found this review helpful.
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Overall Rating
5 out of 5
5 out of 5
about the same
September 3, 2014
longrange
Location: Baton Rouge, LA, USA
How often do you shop at JC Whitney.com? Once a Year
Ease of Use/Installation
3 out of 5
3 out of 5
Quality/Construction
5 out of 5
5 out of 5
" Works the same as a nonpreset spark plug. No noticeable improvements also. "
-1point
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