More air. More character. More boxer.
BoxerFlow Rally Intake for BMW R 1300 GS / GSA
The BoxerFlow Rally Intake is a bolt-on pair of high-flow airbox intake covers for the BMW R 1300 GS and GSA. It replaces the sealed OEM covers with a design engineered to improve airflow, lift power and torque, sharpen throttle response and deliver a deeper, more aggressive intake sound.
Autumn SaleSave €50 · free shipping in the EU · incl. taxes
Secure checkout via Stripe
OEM vs. BoxerFlow
A direct replacement for the closed OEM airbox covers
The stock R 1300 GS / GSA intake covers are sealed panels. The BoxerFlow Rally Intake mounts in exactly the same place, using the same fixing points, but opens the path into the airbox. One set fits both the R1300GS and the R1300GS Adventure.
Original intake covers
Closed panels - the airflow into the airbox is restricted by design.
Part no. 13715A72831 · 13715A72832
BoxerFlow Rally Intake
Open, flow-optimised structure that feeds the airbox and lets the boxer breathe.
Replaces both OEM covers · left + right pair
Bolt-on fitment · no cutting · no permanent modification
Gallery
Fitted to the bike
The Rally Intake mounted on a BMW R 1300 GS - both covers in place on the airbox, and close-ups of the flow channels and the engraved face.
Both covers, rider's view
Left and right Rally Intake covers in place on the airbox, either side of the tank.
In the cockpit
The open covers sit flush in the OEM location - nothing else on the bike moves.
Flow channels
Three open venturi-shaped channels feed the airbox where the OEM panel is sealed.
Engraved face
The name is cut into the part itself, not printed on - it cannot wear off.
On the OEM fixing point
Mounted on the standard fixing - a bolt-on swap with no cutting and no permanent modification.
Open to the airbox
Looking straight through the intake slots into the airbox behind.
Shown on a BMW R 1300 GS · v1.0 production part
What it changes
Engineered for airflow, tested where the road ends
01
More airflow
An open, high-flow geometry replaces the sealed OEM panel and feeds the airbox directly.
02
Power & torque
More air into the engine means more of what the boxer was built to give - across the range.
03
Sharper response
A crisper, more immediate answer to the throttle, where it matters on technical terrain.
04
Deeper intake note
A deeper, more aggressive induction sound - the boxer character, unmuffled.
Engineered, developed & tested in Romania
Developed and tested in Romania by experienced riders in demanding real-world conditions, the BoxerFlow Rally Intake has been put through the kind of rough terrain, dust, heat, mud and long-distance riding that serious adventure riders encounter. Built to perform where the road ends, it combines proven durability with performance-focused airflow for riders who demand more from their BMW R 1300 GS / GSA.
Price & shipping
€149€199
Autumn SaleSave €50 until 1 November
Free shipping in the EU · incl. taxes
Secure checkout via Stripe
We’re shipping within the EU only for now - for shipping outside the EU, contact us at contact@boxerflow.com.
13715A72832
Mounting instructions
Autumn Sale - was €199
Questions
Fitment, filters and the fine print
Will the BoxerFlow Rally Intake fit my R1300GS?
It fits the BMW R 1300 GS and the R 1300 GS Adventure (GSA). It mounts in place of the OEM intake covers, using the same fixing points - bolt-on fitment, no cutting and no permanent modification to the bike.
Which BMW OEM parts does it replace?
Both original airbox intake covers, part numbers 13715A72831 and 13715A72832. The Rally Intake ships as a left and right pair, so one set replaces both OEM covers.
Do I need a performance air filter as well?
Recommended, but not included. The Rally Intake opens the path into the airbox, which makes the stock paper element the next restriction. See the filters that fit the R 1300 GS / GSA below.
Is the Rally Intake road legal?
It is designed for off-road and competition use. In some countries it may not be legal for use on public roads - check with your local authorities before fitting.
What is included, and what does it cost?
€149 including taxes during the Autumn Sale, down from €199, with free shipping inside the EU. The sale price runs until 1 November 2026. The set contains the left and right cover pair plus mounting instructions. An air filter is not included.
How long does delivery take?
Orders are dispatched within 1-2 business days. Inside the EU, delivery normally takes a further 3-7 business days, and shipping is free.
Do you ship outside the EU?
Not through the shop for now - shipping is EU only. For delivery outside the EU, get in touch at contact@boxerflow.com and we will arrange it.
Recommended - not included
Pair it with a performance air filter
The Rally Intake opens the path into the airbox. To get the full benefit, run a high-flow performance air filter behind it - the stock paper element becomes the next restriction. Filters are sold separately; these are the ones that fit the R 1300 GS / GSA.
- K&N Washable, reusable cotton-gauze element. knfilters.com ↗
- DNA Cotton filter set, P-BM13E23-01. e-dnafilters.com ↗
- Sprint Sprint Filter P08 polyester element. sprintfiltershop.com ↗
- BMC Sport air filter, 030.010.630. bmc-sportluftfilter.de ↗
No air filter is included with the Rally Intake, and BoxerFlow is not affiliated with any of these manufacturers - the links are for reference only. Check the fitment for your exact model year before ordering.