This is the Intrax XL, the ultimate 4C coilover suspension kit on the market - if you’re serious about tracking and competing with your Alfa 4C, look no further.

Using a wealth of Intrax experience developing track ready systems for Alfa Romeo's all over the world, this system has some very unique features. Primary features are: Massive 52mm inverted rear MacPherson for maximum stiffness under load, internal oil thermostat for the most consistent dampening, lightweight aluminum shock bodies front and rear, 60mm linear springs, 4-way adjustability, optional remote reservoirs and optional aerospace anti-friction coatings. Top level spec in every detail.

The 4-way is highly advanced and can be setup and left alone, or fine tuned for your mods = infinite adjustability in a system that can grow with your driving needs.

Go up to the top level with the XL, with the largest diameter rear inverted strut cartridge on the market = you can maintain suspension geometry and stiffness under the greatest loads generated on the track. Chose simple 1-way adjustability if your sanctioning body dictates, or go up to 4-way.

3 simple options are available for both: a) external reservoirs, b) BlackTitan anti-friction coating, and c) Arc control valving for enhanced sharp bump control. Contact us with any custom requests.

Adjustment procedure for 4-way front

Adjustment procedure for 4-way rear

*NEW, a) now available EMC which is electronic damper control from in the cabin, see photo. and b) EHC which is the front electronic damper ride height lifting feature

Intrax Racing’s monotube front and inverted rear MacPherson shock designs represent the ultimate in current race technology for the street and track, and deliver performance and handling characteristics far exceeding the capability of the stock 4C suspension system.

All Intrax XL 4C systems come with rear camber slots and A,B,C inserts to help fine tune and gain additional negative rear camber.

Mounting points are upgraded to ultra-precise spherical bearings for maximum chassis feedback through the 4C's carbon fiber monocoque tub, giving ultimate accuracy. Beyond that, our Intrax 4C kits offer a range of upgrade configurations to further tailor your setup: 2-way and 4-way adjustability, optional Black Titan anti-friction coating, and ARC bump control reservoir upgrades. A truly customizable system, inside and out.

Backed by a decade of dedicated Alfa 4C development and a global customer database across motorsport and street applications — real-world data applied to your exact 4C setup is what you get when ordering through Alfa9 Supply.

Alfa9 Supply was instrumental in bringing Intrax to the US market for Alfa Romeo owners 10 years ago, and remains the exclusive USA distributor for Intrax on the Alfa Romeo 4C.

Ready to build your setup? Reach out and we'll walk you through your custom Intrax configuration and make sure we get a setup that’s best for you and creates a rewarding drive every time you are behind the wheel 🏁🇮🇹