For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust
For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust is a stainless steel performance exhaust upgrade priced at $171.55. Features mandrel-bent 3-inch piping and CNC flanges. Best for off-road and racing builds seeking 10-15hp gains.
● In stock
Buy at Lab Work Auto →Price and availability may change. Click to see current details on Lab Work Auto.
Key features
- Stainless steel construction for durability
- 3-inch mandrel-bent piping for flow
- Triple 4.375 x 2.25 bellmouth design
- TIG welded CNC flanges for precision
- Direct bolt-on fit for 02–07 WRX
- 10–15hp gain potential
- For off-road and racing use only
Pros
- +Increases horsepower and turbo response
- +Corrosion-resistant stainless steel build
- +No modifications required for install
- +Works well with 3-inch exhaust systems
- +Durable TIG-welded flange connections
Cons
- −Not legal for street use in California
- −No installation instructions included
- −Not emissions compliant for highway use
About For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust
What is For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust?
Made for 2002–2007 Subaru Impreza WRX models with 2.0L or 2.5L turbo engines, this catless downpipe replaces the restrictive factory unit to improve exhaust flow and engine efficiency. Constructed entirely from durable stainless steel, it features a 3-bellmouth design and 3-inch mandrel-bent piping for consistent diameter and reduced backpressure. The TIG-welded CNC flanges ensure precise fitment and long-term reliability. This direct bolt-on part requires no modifications and delivers measurable performance gains, especially when paired with a 3-inch turbo manifold and catback exhaust system.
Key features
- Material — High-grade stainless steel for corrosion resistance and longevity.
- Bellmouth Design — 4.375 x 2.25-inch triple bellmouth improves turbo spool and exhaust velocity.
- Pipe Diameter — 3-inch mandrel-bent tubing maintains smooth airflow and reduces restriction.
- Flange Construction — CNC-machined and TIG welded for accurate alignment and leak-free seal.
- Performance Gains — Delivers 10–15 horsepower by eliminating catalytic converter bottleneck.
- Fitment — Direct bolt-on for 02–07 WRX 2.0/2.5L engines; no modifications required.
- Intended Use — Designed for off-road, competition, and racing applications only.
Who is For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust for?
This downpipe is ideal for performance enthusiasts and track-day builders upgrading their WRX’s turbo system. It suits users already running or planning a full 3-inch exhaust and turbo manifold setup. Not recommended for daily drivers or street-registered vehicles, especially in California due to emissions regulations. Best installed by those with mechanical experience or access to a professional shop.
How does For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust compare?
Compared to stock or catted downpipes, this catless version offers superior flow and power gains but lacks emissions compliance. It outperforms standard polypropylene or mild steel aftermarket units in durability and thermal resistance. When matched with a full 3-inch exhaust system, it maximizes turbo efficiency better than smaller-diameter or non-mandrel-bent alternatives.
Best use cases
- →Track-day performance builds
- →Off-road competition vehicles
- →Turbo system upgrades
- →Racing engine tuning
- →Full 3-inch exhaust setups
Is For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust right for you?
This downpipe suits experienced DIYers or professional mechanics upgrading a 2002–2007 WRX for track or off-road use. Ideal for those already using or planning a 3-inch turbo manifold and catback. Not for daily drivers or emissions-legal vehicles. Consider catted versions if street compliance is needed. Always verify fitment with your specific engine variant.
How it compares: Outperforms catted and mild steel downpipes in flow and durability. Lacks emissions compliance but delivers better turbo efficiency than stock or restrictive units. Best paired with full 3-inch exhaust systems for maximum gains.
More from Lab Work Auto
#63P-81950-00-00 TRIM RELAY For YAMAHA OUTBOARD F150 & 250 Part
$17.80
(4 pcs) For Ford F-150 Bed Interface Plates Standard Tie Down FL3Z9928408AB
$16.82
-6 An X 5/16-24 O Ring Hydroboost Spittier/Return Port Fitting Car Accessories
$8.20
-6AN AN6 Fuel Adapter Fitting to 3/8 Quick Connect LS W/ Clip Female Black GM
$7.91Frequently Asked Questions
What horsepower gains can I expect?
▾
You can expect 10–15 horsepower gains by removing the restrictive stock downpipe. Results improve when paired with a 3-inch turbo manifold and catback exhaust system for full exhaust flow optimization.
Does this fit all Subaru Impreza WRX models?
▾
This downpipe fits 2002–2007 Subaru Impreza WRX models with 2.0L or 2.5L turbo engines. Verify your engine size and turbo configuration before purchase to ensure compatibility.
How difficult is installation?
▾
Installation is a moderate DIY task requiring mechanical experience. It’s a direct bolt-on but lacks included instructions. Refer to a factory service manual or consult a professional shop for best results.
Is this downpipe street legal?
▾
No, this catless downpipe is not street legal. It’s designed for off-road, competition, and racing use only. It does not meet emissions standards and cannot be used on highway-registered vehicles.
Can I use this with a stock exhaust?
▾
While it will bolt on, maximum performance gains require a full 3-inch exhaust system. Using it with a stock or smaller catback limits flow and reduces horsepower benefits.
How much does For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust cost?
▾
For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust is $171.55 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.
Is For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust in stock at Lab Work Auto?
▾
Yes, For 02-07 Subaru Impreza WRX 2.0/2.5 3 Bellmouth Turbo Catless Downpipe Exhaust is currently in stock at Lab Work Auto.
Specifications
- SKU
- F8-016474