PowerStop K2439 Front Z23 Brake Kit Acura RSX Type-S 2002-2006 / Civic Si

Vehicle Fitment

• 2002-2006 Acura RSX Type-S (2.0L K20A2 I4, FWD)
• 2006-2011 Honda Civic Si (Coupe, 2.0L K20Z3 I4, FWD)
• 2007-2011 Honda Civic Si (Sedan, 2.0L K20Z3 I4, FWD)
• 2008 Honda Civic Si Mugen Si (Sedan, 2.0L K20Z3 I4, FWD)

Fitment Notes

• Front axle kit only - does not include rear rotors or pads; pair with PowerStop K1243 or K2441 for a complete front and rear upgrade
• Fits Acura RSX Type-S and Honda Civic Si (8th gen FA5/FG2) only - these share the larger 300mm front rotor platform
• Does NOT fit the Acura RSX Base - the RSX Base uses a smaller 262mm front rotor; see K2386 for that fitment
• Does NOT fit 2004-2005 Honda Civic Si EP3 hatchback - that generation uses a 262mm front rotor; see K2386
• 5-lug bolt pattern (5x114.3mm / 5x4.5 in.)
• No special modifications required - direct bolt-on installation

Features

• Z23 Carbon-Fiber Ceramic pad compound delivers enhanced stopping power and lower dust versus factory pads
• Drilled & slotted vented front rotors maximize heat dissipation and clear gas and debris from the friction surface
• Low-dust formula validated through on-vehicle third-party testing - 30% less dust on average versus OE
• Dual-layer high-temp rubberized shims provide virtually silent braking
• Silver zinc dichromate plated rotors resist rust and corrosion
• G3000 grade iron castings built to strict OE tolerances for crack resistance and durability
• Includes premium stainless-steel installation hardware and high-temp ceramic brake lubricant
• Bolt-on upgrade - no modifications needed

Specifications

• Kit Coverage: Front Only
• Front Rotor Outside Diameter: 11.81 in. (300 mm)
• Rotor Construction: Full Cast Iron - G3000
• Rotor Type: Vented
• Surface Type: Drilled & Slotted
• Rotor Finish: Silver Zinc Dichromate Plated
• Stud/Lug Hole Quantity: 5
• Bolt Circle Diameter: 5x114.3 mm (5x4.5 in.)
• Pad Compound: Z23 Carbon-Fiber Ceramic
• Pad Shims Included: Yes - Dual-Layer Rubberized

Included Components

• 2x Front Drilled & Slotted Zinc-Plated Brake Rotors
• 1x Front Z23 Carbon-Fiber Ceramic Brake Pad Set (with rubberized shims & hardware)
• 1x Stainless-Steel Installation Hardware Kit
• 1x High-Temperature Ceramic Brake Lubricant

Product Description

The PowerStop K2439 Z23 Evolution Sport Front Brake Kit is a front brake upgrade for the 2002-2006 Acura RSX Type-S and the 2006-2011 Honda Civic Si (8th gen). The Z23 Carbon-Fiber Ceramic pads deliver improved stopping power and significantly less dust than factory pads, while the drilled and slotted vented front rotors keep brake temperatures in check during spirited driving and daily commuting.

G3000 grade iron rotors are precision-cast to OE tolerances for a direct bolt-on fit with no modifications. This kit is specifically for the RSX Type-S and 8th gen Civic Si - both of which use the larger 300mm front rotor. The RSX Base and 2004-2005 Civic Si EP3 use a smaller 262mm rotor and require K2386 instead. For a complete front and rear upgrade, pair with the PowerStop K1243 rear kit.