Why isn't the adjustable toe arm alone sufficient for a track-prepared F2X or F3X?

An adjustable toe arm extends the adjustment range and eliminates rubber bushing deflection at the arm connection. However, the factory eccentric bolt at the subframe connection remains in place and continues holding its position through friction alone. Under sustained high cornering loads, that bolt can rotate and shift toe mid-session regardless of whether an adjustable arm is installed. The lockout hardware eliminates the eccentric entirely, replacing friction with a mechanically fixed connection that cannot rotate under load.

Does this bundle work alongside the SPL RUA F3X rear upper arms?

Yes, and this is the recommended configuration for a complete rear alignment solution on the F2X or F3X. The RTAEL F3X addresses toe adjustment and toe lockout at the toe arm position. The SPL RUA F3X provides rear camber adjustment at the upper arm position. Installing both gives the alignment technician independent control over both rear toe and camber; the full rear geometry solution for performance-aligned F2X and F3X builds. The RUA F3X is sold separately.

Does the combined instruction set cover both the toe link and lockout installation together?

Yes. The RTAEL F3X bundle includes a single instruction PDF that covers the installation of both the adjustable toe arms and the eccentric lockout hardware as an integrated procedure. The file is available via the Dropbox link on the product page.

Are replacement rod ends available for the RTAEL F3X?

Yes. SPL Parts offers replacement rod ends for the RTAEL F3X in both left and right hand thread. Contact SPL Parts directly or use the links on the SPL Parts product page for the correct replacement.

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Description

SPL Parts Adjustable Bumpsteer Rear Toe Links & Eccentric Lockouts for F2x / F3x BMW 1, 2, 3, and 4 Series

The bundle includes the SPL RTA F3X adjustable rear toe links; gun-drilled 2024 aluminum links with Connecticut-made FK spherical rod ends, Teflon liners chemically bonded to the inner race, and SPL’s 360-degree rotating clamp that locks the toe setting with a single 3/16-inch allen key. The adjustment range extends significantly beyond the factory eccentric, reaching alignment targets at any realistic ride height for the F2x or F3x platform. The eccentric lockout hardware; 6061-T6 aluminum lockout washers and Grade 10.9 hex cap bolts with lock nuts; then removes the factory eccentric bolt entirely, replacing its friction-based retention with a mechanically fixed connection that cannot rotate under any cornering load.

Features

Complete rear toe solution in one purchase; adjustable toe links plus mechanical eccentric lockout hardware
Gun-drilled 2024 aluminum main links; black anodized for corrosion resistance; gun-drilling reduces unsprung weight
SPL exclusive 360-degree rotating clamp with 6061-T6 aluminum clamp body and blue anodized titanium socket head cap screws; locks setting without jam nuts; single allen key adjustment
FK spherical rod ends manufactured in Connecticut; self-lubricating, self-cleaning Teflon liner chemically bonded to inner race; zero bushing deflection under load
Teflon liner operating temperature range: -65°F to 325°F; no maintenance required
6061-T6 aluminum eccentric lockout washers; mechanically prevent eccentric rotation under high cornering loads
Grade 10.9 hex cap bolts with lock nuts; cannot loosen under sustained lateral load

Specifications

Body Material: 2024-T351 aluminum (gun-drilled, black anodized)
Heim Joints: PTFE-lined FK USA spherical bearings
Toe Adjustment: Wide range, past OEM eccentric limits
Bumpsteer Adjustment: Yes — fine spacers included
Origin: Made in the USA

Applications

BMW 116d: F20, F21 | 2012-2019
BMW 118d: F20, F21 | 2012-2019
BMW 120d: F20, F21 | 2012-2019
BMW 125d: F20, F21 | 2012-2019
BMW 114i: F20, F21 | 2012-2019
BMW 116i: F20, F21 | 2012-2019
BMW 118i: F20, F21 | 2012-2019
BMW 120i: F20, F21 | 2012-2019
BMW 125i: F20, F21 | 2012-2019
BMW 135i: F20, F21 | 2012-2016
BMW 128ti: F20, F21 | 2019-2019
BMW 220d: F22, F23 | 2014-2021
BMW 225d: F22, F23 | 2014-2021
BMW 220i: F22, F23 | 2014-2021
BMW 228i: F22, F23 | 2014-2016
BMW 230i: F22, F23 | 2016-2021
BMW 240i: F22, F23 | 2016-2021
BMW 316d: F30, F31 | 2012-2019
BMW 318d: F30, F31 | 2012-2019
BMW 320d: F30, F31 | 2012-2019
BMW 325d: F30, F31 | 2012-2019
BMW 330d: F30, F31 | 2012-2019
BMW 335d: F30, F31 | 2012-2019
BMW 330e: F30, F31 | 2015-2019
BMW 316i: F30, F31 | 2012-2019
BMW 318i: F30, F31 | 2012-2019
BMW 320i: F30, F31 | 2012-2019
BMW 328i: F30, F31 | 2012-2016
BMW 330i: F30, F31 | 2016-2019
BMW 335i: F30, F31 | 2012-2015
BMW 340i: F30, F31 | 2015-2019
BMW 420d: F32, F33, F36 | 2014-2020
BMW 425d: F32, F33, F36 | 2014-2020
BMW 430d: F32, F33, F36 | 2014-2020
BMW 435d: F32, F33, F36 | 2014-2020
BMW 420i: F32, F33, F36 | 2014-2020
BMW 428i: F32, F33, F36 | 2014-2016
BMW 430i: F32, F33, F36 | 2016-2020
BMW 435i: F32, F33, F36 | 2014-2016
BMW 440i: F32, F33, F36 | 2016-2020
BMW M135i: F20, F21 | 2012-2016
BMW M140i: F20, F21 | 2016-2019
BMW M235i: F22, F23 | 2014-2016
BMW M240i: F22, F23 | 2016-2021
BMW M340i: F30, F31 | 2019-2019

Notes

Installation Instructions
Includes the RTA toe links plus eccentric lockout plates.
SPL components are made-to-order in the USA; build time will be confirmed at the time of order
Replacement rod ends available from SPL Parts in left and right hand thread, please contact us

Frequently Asked Questions

What is the difference between the SPL RTAEL F3X and the standalone SPL RTA F3X? The RTA F3X is the standalone toe arm pair without lockout hardware. The RTAEL F3X includes both the toe arms and the eccentric lockout hardware in a single purchase; specifically the 6061-T6 aluminum lockout washers and Grade 10.9 hex cap bolts with lock nuts. The bundle also includes a combined instruction set covering both components. For track use, the RTAEL F3X is the recommended choice; the lockout prevents the eccentric slip that the toe arm alone cannot address.
Why isn’t the adjustable toe arm alone sufficient for a track-prepared F2x or F3x? An adjustable toe arm extends the adjustment range and eliminates rubber bushing deflection at the arm connection. However, the factory eccentric bolt at the subframe connection remains in place and continues holding its position through friction alone. Under sustained high cornering loads, that bolt can rotate and shift toe mid-session regardless of whether an adjustable arm is installed. The lockout hardware eliminates the eccentric entirely, replacing friction with a mechanically fixed connection that cannot rotate under load.
Does this bundle work alongside the SPL RUA F3X rear upper arms? Yes, and this is the recommended configuration for a complete rear alignment solution on the F2x or F3x. The RTAEL F3X addresses toe adjustment and toe lockout at the toe arm position. The SPL RUA F3X provides rear camber adjustment at the upper arm position. Installing both gives the alignment technician independent control over both rear toe and camber; the full rear geometry solution for performance-aligned F2X and F3X builds. The RUA F3X is sold separately.
Does the combined instruction set cover both the toe link and lockout installation together? Yes. The RTAEL F3X bundle includes a single instruction PDF that covers the installation of both the adjustable toe arms and the eccentric lockout hardware as an integrated procedure. The file is available via the Dropbox link on the product page.
Are replacement rod ends available for the RTAEL F3X? Yes. SPL Parts offers replacement rod ends for the RTAEL F3X in both left and right hand thread. Contact Bulletproof Sales Team

About SPL Parts

SPL Parts is a USA-based manufacturer of high-performance suspension components engineered for both professional racing and demanding street applications. Built on the core principles of strength, lightweight construction, low friction, and precision, SPL Parts products deliver the adjustability and alignment performance required by top race teams and discerning enthusiasts alike. Every component is produced using USA-sourced, certified materials and machined by experienced local shops to exacting tolerances. Professional TIG welders ensure maximum weld integrity, while each part is hand-fitted and treated with anti-seize and 3M internal panel coating for lasting protection. SPL Parts conducts all research and development in-house, allowing the team to leverage firsthand product knowledge and deliver unmatched customer support. Their suspension components feature innovative adjuster designs for quicker, more precise alignments, and utilize spherical bearings with Teflon liners that are self-cleaning, self-lubricating, and built for long service life. From concept to assembly, SPL Parts is made with pride in the USA by skilled machinists and welders who are committed to quality, innovation, and performance.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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SPL Parts Adjustable Bumpsteer Rear Toe Links & Eccentric Lockouts for F2x / F3x BMW 1, 2, 3, and 4 Series [SPLRTAELF3X]

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SPL Parts Adjustable Bumpsteer Rear Toe Links & Eccentric Lockouts for F2x / F3x BMW 1, 2, 3, and 4 Series

Features

Specifications

Applications

Notes

Frequently Asked Questions

About SPL Parts

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