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Subaru 6MT High Flow Cat Resonated J Pipe Intake Tube Exhaust For 15-21 WRX

Bull Boost Performance
$199.95
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Bull Boost Performance J-Pipe for 2015+ Subaru WRX

Upgrade your 2015+ Subaru WRX with the Bull Boost Performance J-Pipe, designed to enhance turbo performance, improve exhaust flow, and maximize power gains. Engineered for precision fitment and durability, this J-Pipe has been dyno-tested to deliver a significant increase in horsepower and torque when paired with custom tuning.

Proven Performance Gains:

  • 26.7whp (14.1%) and 19.8wtq (9.0%) increase over stock with tuning.
  • Potential gains of 45whp (27%) and 70wtq (41%) on a fully stock vehicle with tuning.

Key Features:

  • Innovative Turbo Flange Design – ½-inch thick for durability while retaining all OEM brackets.
  • One-Piece Tube Construction – Ensures exact fitment, strength, and ease of installation.
  • Optimized 3.5" to 3" Transition – Matches turbine outlet size and reduces smoothly to maintain exhaust velocity.
  • Efficient Tube Routing – Maximizes ground clearance while minimizing flow restrictions.
  • Custom Stainless Turbo Studs – Replaces weak OEM studs for improved reliability.
  • Integrated 3rd O2 Bung – Allows for future use of aftermarket sensors.
  • Factory-Style Grounding Strap Mount – Maintains OEM functionality.
  • High-Flow Catalytic Converter (Catted Models Only) – Features a 300-cell metallic substrate for reduced restriction without excessive emissions odor.

Customer Reviews

Based on 6 reviews
33%
(2)
0%
(0)
17%
(1)
0%
(0)
50%
(3)
M
Matt
Bought a check engine light

If i use a spacer i get low volts code no space i get the horrid po420

J
JC
Catless

I ordered this J-pipe because it says High Flow Cat, but when it came in, no catalytic material. But I still installed it because my county doesn't have emission. Sounds really good though.

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L.T.

Im pretty 100% i have the loudest wrx out there. Sound is crisp and definitely upped the horsepower. If you are buying these you will need 02 spacers to get the check engine light to go away but its well worth it. My car sounds amazing

T
Tristin
No catalytic material

Ordered it and waited to put it on but once I opened it I noticed there was no catalytic material of any kind just a hallow tube

c
carlos
j pipe came with no catalytic element

Been waiting all week to install this and once i opened the box i received a j pipe with no cat material.

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