HKS Circle Earth System

5.0 from 3 reviews

The HKS circle earth system improves idle and drivability by improving the earth grounding points throughout the engine.

HKS - Circle Earth System

HKS' answer to the new earth system. "Circle Magic" enables free layout. If the body's current carrying performance deteriorates, the performance of each electronic part will deteriorate. By changing the ground cable and restoring current carrying performance, it is possible to fully demonstrate the performance of electronic parts.

Features

Circle Plate
- By putting the circle plate with battery terminal, you can install up to 24 wires at the necessary place.
Circle adapter system
- Circle adapter system has 12 connection holes in a concentric fashion which safely and efficiently distribute high-frequency current for better contact and exoergic.
High quality wire
- 8scq gives flexible layout.
Diameter of 0.12mm X 658 stranded cables of Copper wire delivers efficient high-frequency current.
- Each stranded wire allowable current: 65A
24 gold coating
- HKS rethink the fundamental concept of earth by high quality copper or gold coating on circle earth system
Option parts installation
- More cables can be added to any place with separately sold option part.

This part usually ships 9 days after payment.

This part is universal and designed to fit most vehicles, modifications may be required to fit your vehicle. Contact us for further fitment information.

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Universal

Vehicle	Part	Price
48004-AK001 Back in stock 28 Nov 2026 at HKS
Universal	Universal Circle Earth System Type S,D	USD $ 100.84 USD $ 116.72 15,966 JPY

Discontinued

Part	Price	Order
48004-AK003
Additional Terminal Set (Terminal Φ8x5, Terminal Φ6x5, Coated tube x10, HEX bolt M6x5, Wave washer M6x5, Nut M6x5)	DISCONTINUED This part is no longer available

48004-AK002
Additional Wire Kit Wire (3m x1, tie wrap x4)	DISCONTINUED This part is no longer available

About HKS

HKS was founded in October 1973 by Hiroyuki Hasegawa, a former Yamaha engineer, and Goichi Kitagawa, with start-up capital from Sigma Automotive; the name comes from Hasegawa, Kitagawa and Sigma. It began in a small shed at the foot of Mount Fuji, in Fujinomiya, Shizuoka, and is still based there.

In 1974 HKS built one of the first bolt-on turbo kits, for the Nissan L20 engine in the Skyline, raising output from 115 to 160 PS. Turbocharging made its name; today it also makes exhausts, springs, shocks and coilover suspension, and it marked its 50th anniversary in 2023.

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