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Vivid Racing Gear 
HKS 21003-AN015 Forged Piston Set for Nissan Skyline GT-R
Upgrade your Nissan Skyline GT-R (1989-2002) with the HKS 21003-AN015 forged piston set, a premium choice for enthusiasts seeking to boost their engine's performance. HKS Co. Ltd, a renowned name in the automotive aftermarket, has been delivering high-quality performance parts since 1973, and this piston set is no exception.
Key Features
- Displacement: 2,740 cc
- Piston Diameter: 86.5 mm
- Compression Ratio: 8.7 (t=1.2)
- Boring/Honing: Necessary for optimal fit
- Floating Design: Full floating is unnecessary
- Durability: Features a forged piston with a 2-layer Molybdenum coating for enhanced longevity
Why Choose HKS?
HKS has a rich history rooted in innovation, having introduced the first turbocharger for commercial vehicles in 1974. Their products are designed with the performance enthusiast in mind, ensuring you get the most out of your vehicle. The 21003-AN015 pistons are engineered to withstand the rigors of high-performance driving, making them ideal for both street and track use.
Customer Feedback
Users have praised the HKS 21003-AN015 pistons for their reliability and performance improvements. Many have reported noticeable enhancements in throttle response and overall engine efficiency after installation. Whether you’re hitting the track or cruising the streets, these pistons are a solid investment for any Skyline GT-R owner.
Fitment
- Nissan Skyline GT-R: 1989-2002
Important Notes
- All images are for illustration purposes only.
- Unauthorized reproduction and distribution are strictly prohibited.
- Actual product may vary due to enhancements and updates.
Other Part Numbers:
HKS #hks21003-AN015
Proposition 65
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
Since its beginning, HKS has been committed to providing well-integrated, reliable,and environmentally sound performance systems. Mr. Hasegawa's strong leadership, engineering genius, creativity and willingness to listen to customers are the pillars of the company's success. Monitoring consumer reaction and input on issues pertaining to material quality, external appearance, sound quality, and of course, performance, HKS stays in tune with automotive enthusiasts' needs. Moreover, HKS' products are designed to be user friendly for easy installation.
Warranty for Exhaust System
HKS provides a warranty to the original purchaser of HKS exhaust systems against defects in materials and workmanship for a period of one year. The warranty applies only for vehicle specific exhaust systems. Other products such as metal catalyzers, front pipes, exhaust manifolds, and center pipes are not covered.
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Ronald S. Verified Customer 
03-30-25 - NB, Canada
Product knowledge is limited. I ordered a rear spoiler. The delivery time was 3 to 4 months which is fine because I was informed of this up front. While waiting I asked for a copy of the installation instructions and was told that they could not provide them but not to worry because they would be included with the shipment. They were in Japanese when they arrived. I contacted Vivid and asked for an English copy and was told that they were not available. Would have been nice to know this before I ordered.
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Melvin M. Verified Customer 03-29-25 - California, United States
Peter M. Verified Customer 03-29-25 - CA, United States
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