Buying performance parts one at a time is the normal path for most builds, but COBB also sells a bundled option for the Subaru STI that packages three of its most popular upgrades together at a discount. The COBB Stage 1+ Power Package combines the Accessport V3, the SF Intake, and the SF Airbox into a single purchase. This post covers what is actually in the bundle, whether the savings are real, who should buy it versus who is better off building the same setup piece by piece, and what else is worth planning for before installing it.
What’s Actually in the Bundle
The Stage 1+ Power Package includes the COBB Accessport V3, the COBB SF Intake, and the COBB Airbox. These three parts work together as a system, the airbox encloses the SF Intake to give it the cold air benefits of a true cold air intake without the water ingestion risk of an open in-fender design, and the Accessport is what actually lets a tune take advantage of the airflow change once the hardware is installed.
Doing the Actual Math
Priced individually, the Accessport runs $770, the SF Intake runs $340, and the Airbox runs $290, a combined total of $1,400. The Stage 1+ bundle prices the same three parts at $1,265, a genuine savings of $135 rather than a marketing number dressed up to look like a deal. For anyone planning to buy all three parts regardless, the bundle is the objectively cheaper path to the same end result.
The Catch: This Only Makes Sense If You Need All Three
The savings only apply if all three components are actually wanted. Someone who already owns an Accessport from a previous build, or who wants the SF Intake without the airbox enclosure, gets no benefit from the bundle price and would be better off buying only the missing piece individually. The post on WRX intake upgrades, cold air vs short ram covers the broader tradeoff between intake styles, which is worth reading before assuming the full airbox and intake combination is necessary for a given build’s goals.
Why These Three Parts Are Sold Together
This is not an arbitrary bundle assembled purely for a discount. The airbox specifically requires the SF Intake to function as intended, and running either the intake or the airbox without a corresponding tune leaves real performance on the table. Packaging all three together reflects how COBB actually intends the system to be used, rather than three unrelated parts grouped together for a sales incentive. The post on best air intake upgrades for Subaru WRX and STI covers where this specific combination ranks against other intake options on the platform.
The Convenience Factor Beyond the Dollar Savings
Beyond the direct dollar savings, there is a convenience factor worth considering too. Sourcing three individually compatible parts and confirming they work together correctly takes real research time, and getting one detail wrong, an incompatible intake variant, a mismatched tune, can mean returns, delays, or a setup that never quite performs as expected. Buying a pre-validated bundle removes that research burden entirely, since COBB has already confirmed these three specific parts work together as designed. For anyone who values their own time as much as the purchase price, that convenience is a real, if harder to quantify, part of the bundle’s value.
The Fuel System Detail Worth Knowing
COBB’s own documentation notes something worth flagging before installing this package. The 2015 and newer STI fuel system has just enough capacity to support Stage 1+ level modifications, but that margin runs out quickly if a turbo-back exhaust gets added on top of it. Anyone planning to pair this bundle with a more aggressive exhaust upgrade should factor in a fuel pump and injector upgrade at the same time rather than assuming the stock fuel system has unlimited headroom. The post on how much power can the stock WRX/STI fuel system handle covers this ceiling in more depth, and the post on the AEM 340LPH in-tank fuel pump kit for Subaru WRX and STI covers a straightforward starting point if a fuel system upgrade becomes necessary alongside this package.
Tuning Comes With the Territory
Since the Accessport is included, tuning is built into this bundle rather than being a separate consideration. COBB provides off-the-shelf maps calibrated for this exact hardware combination, which removes the guesswork of matching a tune to the airbox and intake setup. Anyone who already owns an Accessport and is only buying the intake and airbox separately still needs to load the correct off-the-shelf map or get a custom tune, the tuning requirement does not go away just because the bundle isn’t being purchased as a whole.
Installation Time and Complexity
Installation for this package is straightforward relative to the performance gain it delivers. The intake and airbox install without requiring any cutting or permanent modification to factory components, and the Accessport itself is a plug-and-play tool that connects to the factory OBD port rather than requiring any wiring work. Most owners can complete the physical installation in an afternoon, with the off-the-shelf map load taking only a few additional minutes once the hardware is in place. This relatively low installation barrier is part of why this specific bundle has become such a popular early upgrade path on the STI platform.
Where This Fits in a Build Sequence
This package sits well as an early-stage upgrade, hence the Stage 1+ naming, appropriate for a build that has not yet moved into bigger turbo or high boost territory. The STI bolt-on upgrades hub covers where a package like this fits relative to other early modifications, and the STI engine build and power goals hub covers how airflow and tuning upgrades like this one set the stage for bigger changes down the line. The STI turbo and airflow upgrades hub covers this specific category of upgrade in more depth alongside turbo and boost related decisions.
Who Should Buy the Bundle vs Buy Piece by Piece
The bundle makes sense for anyone starting fresh on an STI with no existing Accessport, intake, or airbox already installed, and planning to run all three regardless of price. It makes less sense for anyone already partway into a build with one or more of these parts already owned, or for anyone who specifically wants only the intake without the airbox enclosure. Someone shopping primarily on price rather than convenience should still run the math on their specific situation rather than assuming the bundle is automatically the better deal, since the savings only exist when every component is genuinely needed. The honest answer to whether the bundle is worth it depends entirely on what is already sitting in the garage versus what still needs to be purchased.
Frequently Asked Questions
How much money does the Stage 1+ bundle actually save?
Buying the Accessport, SF Intake, and Airbox separately totals $1,400. The bundle prices the same three parts at $1,265, a savings of $135.
Do I need all three parts for the bundle to make sense?
Yes. If any of the three components is already owned or not wanted, buying only the missing pieces individually is the better value rather than paying for the full bundle.
Does this bundle include a tune?
It includes the Accessport, which is the tool used to load a tune, along with access to COBB’s off-the-shelf maps calibrated for this exact hardware combination.
Do I need to upgrade my fuel system to run this package?
Not necessarily on its own, but the stock fuel system’s margin at this modification level runs out quickly if a turbo-back exhaust gets added at the same time, so it is worth planning for a fuel system upgrade if that is also part of the build.
How long does installation actually take?
Most owners complete the physical installation of the intake and airbox, plus loading the off-the-shelf map through the Accessport, in an afternoon, since none of the components require cutting or permanent modification to factory parts.
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