What is the difference between the SPL TR F3X and the SPL TR E9X?

These are two separate tension rod products for two different BMW platform generations. The TR E9X fits E8X, E9X, and F8X models. The TR F3X fits RWD F2X and F3X models (2010-2019 F20, F21, F22, F23, F30, F31, F32, F33, F34, F35, F36). The tension rod mounting geometry differs between these platform families, so the two parts are not interchangeable. Confirm your chassis before ordering.

Is there a separate version of this tension rod for xDrive F2X and F3X models?

Yes. This listing, the SPL TR F3X, is designed exclusively for RWD F2X and F3X models. A separate part, the SPL TR F3iX, exists for xDrive AWD F2X and F3X variants. The xDrive front subframe geometry differs from the RWD configuration, which is why SPL produces distinct parts for each drivetrain. Ordering the wrong version will result in a fitment issue; confirm your drivetrain before ordering.

Why are JMX hardened rod ends used on the tension rod instead of standard FK rod ends?

The tension rod operates under sustained longitudinal loading from caster forces throughout normal driving and more intensely under hard braking, where the front wheels are being driven forward against the tension rod's resistance. This sustained load is higher than what most other suspension arms experience, which is why SPL specifies the JMX; a hardened, higher-tensile-strength version of the standard FK rod end; for this position specifically. The PTFE liner and articulation characteristics are the same; the structural difference is in the rod end body's hardness and load rating.

What does anti-dive geometry tuning actually change on the F2X or F3X?

Anti-dive geometry describes how much the front suspension resists compression under braking load. More anti-dive geometry means the front end stays flatter under hard braking, maintaining better front tire contact and improving brake stability. Less anti-dive geometry allows more nose dive, which some drivers prefer for feel. The stainless steel spacers in the TR F3X allow this characteristic to be adjusted at the tension rod's subframe connection point, changing the effective geometry angle without affecting the caster setting.

Does this tension rod pair with the SPL caster rod bushings for even more caster adjustment range?

Yes. The SPL CRB F3X caster rod monoball bushings and the SPL TR F3X tension rods target two different points in the front caster adjustment system. The caster rod bushings replace the rubber inserts in the existing caster rod arms and can add up to +/- 4 degrees of caster adjustment. The tension rods replace the tension rod arm itself and add their own adjustment range. Running both together provides the maximum possible front caster adjustment range and eliminates rubber deflection at both connection points simultaneously.

Description

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BP PRICING DIFFERENCE

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Description

SPL Parts Adjustable Front Tension Rods for F2x / F3x BMW 1, 2, 3, and 4 Series

The front tension rod on the BMW F2x and F3x defines front caster; the angle of the steering axis that determines how the front wheels steer, how the steering self-centers, and how stable the car feels at speed and under hard braking. The factory rubber bushing in this arm deflects under the sustained loads of performance driving, allowing caster to shift away from its set value mid-corner and mid-braking. The factory adjustment range is also limited; designed for factory ride height tolerances, not for lowered cars or performance alignment targets that require more caster than BMW specifies from the factory. The SPL Parts TR F3X replaces both the rubber bushing and the factory adjustment range with a precision-built tension rod machined from billet 2024 aluminum hex rod, gun-drilled to reduce unsprung weight without compromising the stiffness that makes the rod effective. The 360-degree rotating clamp with 6061-T6 aluminum clamp body and blue anodized titanium socket head cap screws locks the caster setting without jam nuts; one tool, one step, done trackside or at the alignment rack.

Features

Wide-range front caster adjustment; extends significantly beyond the factory eccentric adjustment range for precision alignment at any ride height
Stainless steel anti-dive spacers included; allows independent tuning of front anti-dive geometry separate from caster setting
Hardened FK JMX high-misalignment rod ends; upgraded, stronger version of the standard FK rod end; specified for the sustained longitudinal loading of the tension rod position
ASTM A574 socket head cap bolts at connection hardware; minimum tensile strength of 170,000 psi; specified for maximum articulation with superior strength
Gun-drilled billet 2024 aluminum hex rod links; precision CNC-machined; 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 caster without jam nuts; single-tool adjustment
PTFE Teflon liner chemically bonded to inner race; operating temperature range -65°F to 325°F; self-lubricating, self-cleaning, no maintenance required

Specifications

Body Material: 2024-T351 aluminum (gun-drilled, black anodized)
Bushings: PTFE-lined FK USA spherical bearings
Adjustment: Caster
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 128ti: F20, F21 | 2019-2019
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 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
Not compatible with AWD models
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 TR F3X and the SPL TR E9X? These are two separate tension rod products for two different BMW platform generations. The TR E9X fits E8x, E9x, and F8x models. The TR F3X fits RWD F2x and F3x models. The tension rod mounting geometry differs between these platform families, so the two parts are not interchangeable. Confirm your chassis before ordering.
Is there a separate version of this tension rod for xDrive F2x and F3x models? Yes. This listing, the SPL TR F3X, is designed exclusively for RWD F2x and F3x models. A separate part, the SPL TR F3iX, exists for xDrive AWD F2x and F3x variants. The xDrive front subframe geometry differs from the RWD configuration, which is why SPL produces distinct parts for each drivetrain. Ordering the wrong version will result in a fitment issue; confirm your drivetrain before ordering.
Why are JMX hardened rod ends used on the tension rod instead of standard FK rod ends? The tension rod operates under sustained longitudinal loading from caster forces throughout normal driving and more intensely under hard braking, where the front wheels are being driven forward against the tension rod’s resistance. This sustained load is higher than what most other suspension arms experience, which is why SPL specifies the JMX; a hardened, higher-tensile-strength version of the standard FK rod end; for this position specifically. The PTFE liner and articulation characteristics are the same; the structural difference is in the rod end body’s hardness and load rating.
What does anti-dive geometry tuning actually change on the F2x or F3x? Anti-dive geometry describes how much the front suspension resists compression under braking load. More anti-dive geometry means the front end stays flatter under hard braking, maintaining better front tire contact and improving brake stability. Less anti-dive geometry allows more nose dive, which some drivers prefer for feel. The stainless steel spacers in the TR F3X allow this characteristic to be adjusted at the tension rod’s subframe connection point, changing the effective geometry angle without affecting the caster setting. This is an adjustment most aftermarket tension rods do not provide.
Does this tension rod pair with the SPL caster rod bushings for even more caster adjustment range? Yes. The SPL CRB F3X caster rod monoball bushings and the SPL TR F3X tension rods target two different points in the front caster adjustment system. The caster rod bushings replace the rubber inserts in the existing caster rod arms and can add up to +/- 4 degrees of caster adjustment. The tension rods replace the tension rod arm itself and add their own adjustment range. Running both together provides the maximum possible front caster adjustment range and eliminates rubber deflection at both connection points simultaneously.

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 Front Tension Rods for F2x / F3x BMW 1, 2, 3, and 4 Series [SPLTRF3X]

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SPL Parts Adjustable Front Tension Rods for F2x / F3x BMW 1, 2, 3, and 4 Series

Features

Specifications

Applications

Notes

Frequently Asked Questions

About SPL Parts

Reviews