A'PEXi - RS Evolution Extreme (Axleback) - 2022+ Subaru WRX (VB) ** In Stock **

APEXi SKU: 113-KF01


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The RS Evolution Extreme is based on the RS Evolution Muffler with the addition of full titanium tips. A Hybrid muffler uniting the power and free-flowing characteristics of our N1 Muffler with the quiet and discreet sound output of our Hybrid Megaphone Evolution Muffler. The RS Evolution Muffler is a combination of an A'PEXi original patented megaphone piping structure design and larger piping diameters to produce ultimate performance for your turbo-charged engine.

- High-level of quality using tig-welded SUS304 stainless steel uniting quiet performance with high-power performance gains
- Matched and manufactured for select chassis
- Patented Megaphone piping structure to produce excellent torque and throttle response throughout the powerband. This piping design allows for a swirling exhaust gas flow effect that has for years produced proven results.

Bolt-On Yes
Part Number 113-KF01
Year 2022+
Make Subaru
Model WRX (VB)
Body Style 4-Door Sedan
Engine FA24F (T/C)
Chassis VB (M/T and A/T)
Exhaust Type RS Evolution Extreme Muffler
Piping Diameter 60mm x 2
Tip Diameter 93mm. x 4
Pieces 2 (Left and Right)
Exhaust Tip Style Titanium Round- Dual wall rolled, Angle cut (Riveted)
Piping Material SUS304 Stainless Steel
Muffler Material SUS304 Stainless Steel
Muffler Tip Material TP270 Gr Titanium
Compatibility - Factory OE Midpipe 
- A'PEXi - N1 Evo Extreme (MidPipe) - SKU: 144-KF01
Special Notes NOTE: Do not use harsh chemicals or metal polish cleaners when cleaning titanium tips. We recommend using standard isopropyl alcohol
WARNING: California Prop 65
Cancer & Reproductive Harm