APEXi RS EVO Quad Tip Axleback Exhaust - 2022+ Subaru WRX

The A'PEXi RS Evolution Extreme builds upon the original RS Evolution Muffler design with the addition of full titanium tips, blending signature A'PEXi performance with refined sound control. Developed as a hybrid system, it unites the aggressive power characteristics of the N1 Muffler with the quieter, more composed tone of the Hybrid Megaphone Evolution.

Key Features

• Premium Construction: TIG-welded SUS304 stainless steel ensures durability, corrosion resistance, and precise fitment.
• Hybrid Sound Design: Combines free-flowing performance with a balanced, street-friendly tone.
• Patented Megaphone Piping: A'PEXi’s signature design promotes a swirling exhaust flow for improved torque and throttle response throughout the RPM range.
• Full Titanium Tips: Dual-wall rolled and angle-cut tips crafted from TP270 Gr titanium deliver a race-inspired finish.
• Direct Bolt-On Fit: Designed to bolt directly to the OEM midpipe or A'PEXi N1 Evo Extreme midpipe (SKU: 144-KF01).

Why We Like It

The RS Evolution Extreme delivers that unmistakable A'PEXi tone—deep and defined without being overpowering. The titanium tips set off the rear of the VB WRX perfectly, while the system’s dual 60mm piping ensures smooth, consistent power delivery across the FA24’s boost curve.

Specifications

• Exhaust Type: RS Evolution Extreme Axleback
• Piping Diameter: 60mm x 2
• Tip Diameter: 93mm x 4
• Pieces: 2 (Left and Right)
• Exhaust Tip Style: Titanium dual-wall rolled, angle-cut (riveted)
• Piping Material: SUS304 Stainless Steel
• Muffler Material: SUS304 Stainless Steel
• Muffler Tip Material: TP270 Gr Titanium
• Bolt-On: Yes

RS-X Evolution Extreme Exhaust - 2022+ Subaru WRX (VB) Overview

Installation Notes

• Direct bolt-on to factory OE midpipe or A'PEXi N1 Evo Extreme midpipe (SKU: 144-KF01).
• Reuses OEM hangers; no cutting or welding required.
• Professional installation recommended for proper alignment and sealing.

What’s in the Box

• Left and right RS Evolution Extreme muffler sections
• Gaskets and necessary installation hardware
• Instruction manual

Compatibility & Disclaimers

For off-road or motorsport use only in some regions. Check local noise and emissions regulations before installation. System is designed for OEM or A'PEXi midpipe compatibility only.