Redback Manifold Catalytic Converter for Subaru Outback
SWDRRP$1909.00Redback Manifold Catalytic Converter.
View partRBH724
Redback Unequal Headers Redback for Subaru Impreza EJ20 EJ25
Redback Unequal Headers Redback.
BrandRedbackSWD
Category: Extractors and headers
Part specs
- Header Design
- Tri-Y
- Header Primary Size
- 041mm (1 5/8")
- Header Outlet Size
- 051mm (2")
- EGR Fitting
- N/A
- Fits With Air Conditioning
- Yes
- Header Secondary Size
- 051mm (2")
- Fits Power Steering
- Yes
- Fitting Time [min.]
- 60
The Redback RBH724 is a set of unequal-length headers listed to fit the Subaru Impreza with the EJ20 and EJ25 engines from 1998. It replaces the factory manifold and carries a recommended retail of $945.
What does 'unequal-length' mean on a boxer header?
On a flat-four like Subaru's EJ, the header layout matters because of how the cylinders are arranged across two banks. 'Unequal-length' describes a design where the primary tubes differ in length before they merge — a layout long associated with the characteristic boxer exhaust note. This is the front of the exhaust on the engine; the system behind the collector is separate. Redback doesn't publish the tube diameter or material for the RBH724 in our data, so the workshop confirms the actual part rather than us quoting numbers we can't trace.
Will it suit my Impreza?
It's listed to fit the Subaru Impreza with the EJ20 and EJ25 engines from 1998. Those are two engine variants, so the exact motor matters for the right set. Tell us which EJ your Impreza runs and we'll check the RBH724 against the listing before ordering.
Is it road legal?
Headers sit ahead of the emissions and silencing equipment, so legality depends on the complete system and how the car is presented for registration in NSW. We don't make a blanket claim on a header set on its own — confirm your requirements with the workshop first.
What does fitting involve at our Illawarra workshop?
Oak Flats Muffler Men fits Subaru header sets in the Illawarra. Boxer access can be tight, so we check the studs and the collector joint while the old manifold is off, then fit the RBH724 with fresh gaskets. Book the Impreza in and we'll confirm clearances on the hoist.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- Does the RBH724 suit EJ20 and EJ25?
- It's listed for the Subaru Impreza with the EJ20 and EJ25 from 1998. Confirm which engine you have with the workshop before ordering.
- Why unequal-length?
- It's a header design where the primary tubes differ in length before merging, long associated with the boxer note. We confirm the part against the listing.
- How much is it?
- The recommended retail is $945, with fitting quoted when you book at the Illawarra workshop.
Fitment support across the Illawarra
Fitment checks near you across 18 Illawarra suburbs, from Oak Flats and Shellharbour to Wollongong and Kiama.Show nearby fitment areasCollapse section
Oak Flats Muffler Men can check this part against supplier specs, part number, image, RRP and vehicle details for customers around Oak Flats, Shellharbour, Wollongong, Dapto, Albion Park, Kiama and the northern suburbs.
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Send the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.