# ACT 04-20 WRX STI Mod Twin HD Race Kit Sprung Mono-Drive Hub Torque Cap 895ft/lbs Not For Street Use

T1R-S05 Mod-Twin 225 HD Sprung Race Kit performs aggressive launches and smoother shifting in high powered AWD’s by combining twice the ceramic friction surfaces with an ultra-durable Mono-Drive sprung hub assembly in a completely modular design. Each diaphragm spring endures an exclusive four-stage heat treating process providing a consistent light pedal feel. Puck-style Friction Plates with high quality ceramic friction materials deliver high friction coefficient, superior heat capacity, and long clutch life. These Friction Plates uniformly transfer torque to a Mono-Drive sprung hub assembly which extends input shaft life and reduces driveline shock from torsional vibration. This kit includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, sprung Mono-Drive hub assembly, floater, patented Monoloc Collar, release bearing, alignment tool and pilot bearing (if needed). Mod-Twin clutches are fully rebuildable and most components can be ordered separately.

-   "Excellence in Performance", backed by the best one-year warranty in the industry!

This Part Fits:

Year

Make

Model

Submodel

2004-2014

Subaru

Impreza

WRX STI

2007,2011-2014

Subaru

Impreza

WRX STI Limited

2010

Subaru

Impreza

WRX STI Special Edition

2015-2021

Subaru

WRX STI

Base

2015

Subaru

WRX STI

Launch Edition

2015-2021

Subaru

WRX STI

Limited

2019

Subaru

WRX STI

S209

2016

Subaru

WRX STI

Series.HyperBlue

2018

Subaru

WRX STI

Type RA

## Details

- **Price:** 3010.56 CAD
- **Vendor:** ACT
- **Type:** Clutch Kits - Multi

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3010.56 CAD | In stock |

## Images

- Photo - Primary
- Photo - out of package
- Photo - out of package
- Photo - out of package
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/act-04-20-wrx-sti-mod-twin-hd-race-kit-sprung-mono-drive-hub-torque-cap-895ft-lbs-not-for-street-use)
> Updated: 2026-07-03