Engines and Components› Pistons and Piston Rings

JE Pistons

BBC NITROUS DOME GP

$1,281.66

SKU: J001 312687

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

JE Pistons Nitrous Series pistons designed for nitrous featuring, vertical and lateral gas ports have been incorporated to optimize top ring seal and reduce friction. Ring grooves are machined to accept JE Pro Seal series J860 "HNS" Hardened Nitrous Series rings with .043 back-cut top ring, 1/16 taper face second ring, and 3/16 oil ring. Compression height figured using 9.780" deck height with zero deck clearance. Fits most open chamber cylinder heads. Part Number 258199 is designed for a decked block. Includes: Pin #990-2930-18-51S (174g), Double spiro locks (#990-042-CS), Vertical and Lateral gas ports, Contact reduction grooves.

Fitment

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Specifications

BrandJE Pistons
Part NumberJ001 312687

Videos

How to identify your JE Pistons

How to identify your JE Pistons
Piston Coatings 101: Which is the Right One for You?

Piston Coatings 101: Which is the Right One for You?
Best Piston Rings for Nitrous (And How to Gap Them)

Best Piston Rings for Nitrous (And How to Gap Them)
We Won an Award for These! SEMA Sneak Peek 👀

We Won an Award for These! SEMA Sneak Peek 👀
Why Forged Pistons Are BETTER Than Cast | JE Ultra Series Pistons [TECH TALK]

Why Forged Pistons Are BETTER Than Cast | JE Ultra Series Pistons [TECH TALK]
Which SRP Piston is Right for You?

Which SRP Piston is Right for You?
Introducing the Strongest Pistons in Powersports | JE Ultra Series

Introducing the Strongest Pistons in Powersports | JE Ultra Series
Forged vs Cast Piston Strength!

Forged vs Cast Piston Strength!
Stock vs race pistons: Which is better?

Stock vs race pistons: Which is better?
Piston Options - What to look for when buying pistons for your 2JZ | RS Garage Jays Tech Tips

Piston Options - What to look for when buying pistons for your 2JZ | RS Garage Jays Tech Tips
Cast vs. Forged Pistons: Which One is Best for Your Engine?

Cast vs. Forged Pistons: Which One is Best for Your Engine?

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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