Reviews of DNJ pistons

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Not enough data to calculate the score

Missing 8 reviews

7 votes

Average rating ?

2.5

Power:

2.5

2 reviews

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DNJ › Pistons

SorryBro 29 Jul 2025, 13:43

Power:

Rating 3.0

I am only running stock and used stainless steel, also have had the DNJ pistons in mine now for about 2 years and they appear to hanging in there at least on stock power. I did switch the rings to Total Seal rings and not DNJ, don't know if that made a difference or not but it felt like a better choice.

Pros: hanging in there

DNJ › Pistons

v8packard 22 Nov 2023, 04:57

Power:

Rating 2.0

Not very good. They tend to be rebuilder quality, at best. The often have a reduced compression height and are nothing really to write home about.

Cons: rebuilder quality, reduced compression height

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What we know about DNJ pistons

The brand is registered in USA. Official website: http://enginecomponents.com/.

In March 2026, PartReview does not yet have a formed opinion of DNJ pistons. You can help by adding a review for DNJ pistons.

Currently there are 2 reviews and 7 votes. Average rating — 2.5 out of 5. Vote balance: 2 up, 5 down.

Users also evaluated the qualities of DNJ pistons:

Power - engine feels weak, especially under load - rated ambivalently. 2.5 points out of 5.
Smoke - blue smoke indicates oil getting past pistons - no rating yet
Noise - deep knocking under heavy throttle is a danger sign - no rating yet

Pistons DNJ in car-specific ratings

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