What is the difference between the SPL RTAEL F8X and the standalone SPL RTA F8X?

The RTA F8X is the standalone toe arm pair without lockout hardware. The RTAEL F8X includes both the toe arms and the eccentric lockout hardware; 6061-T6 aluminum lockout washers and Grade 10.9 hex cap bolts with lock nuts; in a single purchase. The bundle also includes a combined installation instruction set covering both components installed together. For any build that tracks, the RTAEL F8X is the complete solution; the lockout hardware prevents the eccentric slip that the toe arm alone cannot address.

Does the RTAEL F8X fit both the F8X and G8X generations?

Yes. One part number covers the F8X generation (2014-2021 F80 M3, F82/F83 M4, F87 M2) and the G8X generation (2021+ G80 M3, G82/G83 M4, G87 M2). The rear toe arm mounting geometry and the eccentric bolt location are consistent across both generations for this application.

Why doesn't the adjustable toe arm alone prevent toe shift on track?

An adjustable toe arm extends the adjustment range and eliminates rubber bushing deflection at the arm. However, the factory eccentric bolt at the subframe connection point remains in place and continues to hold its position through friction alone. Under sustained high cornering loads, that friction can be overcome, rotating the bolt and shifting toe mid-session regardless of whether an adjustable arm is installed. The eccentric lockout hardware removes that eccentric entirely and replaces its friction-based retention with a mechanically fixed connection; the bolt cannot rotate under any load.

What is the most efficient way to use this bundle at an alignment shop?

During alignment, set the toe target using the rotating clamp system (a single 3/16-inch allen key locks the setting). Once toe is at the desired value, install the eccentric lockout hardware to mechanically fix the subframe connection. The rotating clamp holds the arm; the lockout holds the eccentric position. After both are installed, the toe setting is locked at two independent points. Subsequent sessions require only a confirmation check unless the alignment target is being deliberately changed.

Are replacement rod ends available for the RTAEL F8X?

Yes. SPL Parts offers replacement rod ends for the RTAEL F8X 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 with Eccentric Lockouts for F8x / G8x BMW M2 / M3 / M4

The SPL Parts RTAEL F8X solves both halves at once. The SPL RTA F8X adjustable toe arms eliminate the factory eccentric’s limited range and rubber bushing deflection, replacing them with gun-drilled 2024 aluminum links, FK spherical rod ends with self-lubricating Teflon liners, and a 360-degree rotating clamp that locks the setting with a single allen key. The 6061-T6 aluminum eccentric lockout washers and Grade 10.9 hex cap bolts with lock nuts then remove the factory eccentric bolt entirely and replace its friction-based retention with a mechanically fixed connection that cannot rotate under any cornering load. The combination delivers the full rear toe solution in one purchase; extended range, precise adjustment, and mechanically locked retention.

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 toe 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 M2: F87, G87 | 2016-present
BMW M3: F80, G80, G81 | 2014-present
BMW M4: F82, F83, G82, G83 | 2014-present

Notes

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

Frequently Asked Questions

What is the difference between the SPL RTAEL F8X and the standalone SPL RTA F8X? The RTA F8X is the standalone toe arm pair without lockout hardware. The RTAEL F8X includes both the toe arms and the eccentric lockout hardware; 6061-T6 aluminum lockout washers and Grade 10.9 hex cap bolts with lock nuts; in a single purchase. The bundle also includes a combined installation instruction set covering both components installed together. For any build that tracks, the RTAEL F8X is the complete solution; the lockout hardware prevents the eccentric slip that the toe arm alone cannot address.
Does the RTAEL F8X fit both the F8x and G8x generations? Yes. One part number covers the F8x generation and the G8x generation. The rear toe arm mounting geometry and the eccentric bolt location are consistent across both generations for this application.
Why doesn’t the adjustable toe arm alone prevent toe shift on track? An adjustable toe arm extends the adjustment range and eliminates rubber bushing deflection at the arm. However, the factory eccentric bolt at the subframe connection point remains in place and continues to hold its position through friction alone. Under sustained high cornering loads, that friction can be overcome, rotating the bolt and shifting toe mid-session regardless of whether an adjustable arm is installed. The eccentric lockout hardware removes that eccentric entirely and replaces its friction-based retention with a mechanically fixed connection; the bolt cannot rotate under any load.
What is the most efficient way to use this bundle at an alignment shop? During alignment, set the toe target using the rotating clamp system (a single 3/16-inch allen key locks the setting). Once toe is at the desired value, install the eccentric lockout hardware to mechanically fix the subframe connection. The rotating clamp holds the arm; the lockout holds the eccentric position. After both are installed, the toe setting is locked at two independent points. Subsequent sessions require only a confirmation check unless the alignment target is being deliberately changed.
Are replacement rod ends available for the RTAEL F8X? Yes. SPL Parts offers replacement rod ends for the RTAEL F8X 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.

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 with Eccentric Lockouts for F8x / G8x BMW M2 / M3 / M4 [SPLRTAELF8X]

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SPL Parts Adjustable Bumpsteer Rear Toe Links with Eccentric Lockouts for F8x / G8x BMW M2 / M3 / M4

Features

Specifications

Applications

Notes

Frequently Asked Questions

About SPL Parts

Reviews