GT1R Spec ‘Pro Mod’ big bore piston set, 94.4mm stroke
GT1R Spec ‘Pro Mod’ big bore piston set, with rings and T1-spec DLC wrist pins.
Stroke: 94.4mm
Compression Height: 1.23
Dome Volume: +1.0cc
Bore Options
- 98.00mm
- 98.25mm
- 98.50mm
- 99.00mm
- 100.00mm
***Customer Service will reach out to you for bore size after ordering***
Details
Frequently Asked Questions About GT1R Spec ‘Pro Mod’ big bore piston set
What makes this piston set different from the standard 88mm stroke version?
This set is specifically designed for a 94.4mm stroker crankshaft. It features a shorter 1.23-inch compression height to accommodate the longer crank throw without protruding from the engine block deck.
Why is a sleeved block required for these pistons?
These are 'Big Bore' pistons starting at 98.00mm. Since the factory bore is only 95.5mm, you must install aftermarket ductile iron sleeves or use a billet block to run these larger diameters.
What is the benefit of the T1-Spec DLC wrist pins?
Stroker engines create higher side-loading on the pistons. The Diamond-Like Carbon (DLC) coating on the pins drastically reduces friction and prevents galling, ensuring reliability under extreme horsepower.
How do I choose between the 98mm, 99mm, or 100mm bore options?
The choice depends on your specific engine block machining and displacement goals. You don't need to choose at checkout; our team will contact you to confirm the exact size needed for your build.
Is the +1.0cc dome volume suitable for high-boost applications?
Yes. The +1.0cc dome is calculated to provide an efficient compression ratio specifically for the geometry of a 94.4mm stroker engine, ensuring optimal combustion for high-boost race setups.
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