Turbosmart ALV40 Anti-Lag Valve Kit - Universal
Turbosmart ALV40 Anti-Lag Valve Kit Diagram
Turbosmart ALV40 Anti-Lag Valve Kit - Universal

Turbosmart ALV40 Anti-Lag Valve Kit - Universal

Brand: Turbosmart
SKU: TS-0552-1402
If you find a lower price at an eligible UK retailer website, we will match it.
Looking for a garage for tuning, servicing or fitting? Contact us for a quote.

The Turbosmart ALV40 Anti-Lag Valve provides a means to maintain turbine speed and eliminate lag on gear changes & deceleration.

Boost pressure from the turbo is diverted around the engine on these closed throttle situations and combined with a fuel and ignition strategy (from the ECU) ensuring the turbine speed is maintained and useable boost is on the ready, for when the throttle is opened again.

How It Works - Chris Doumbos, Turbosmart Head Engineer states “The valve allows for incoming fresh air to be diverted safely into the exhaust manifold, pre-turbo with the throttle closed to allow for safer spooling of the turbocharger without the potentially damaging combustion event style anti-lag that can induce high engine & turbo stresses, even break connecting rods”. The valve is a sealed twin-chamber design with the top port being the primary control port, the spring is designed to open under vacuum conditions to allow for the air to bypass into the exhaust manifold, the lower chamber for twin port control methods to control the valve irrespective of manifold pressure and shaft seal allows for leak.”

Diverting the incoming air safely into the exhaust manifold pre-turbine wheel, the Turbosmart Anti-Lag Valve allows for safer spooling of the turbocharger without causing any throttle damage to your vehicle. Boasting a 40mm valve diameter with a purpose designed actuator housing, the sealed twin chamber design is designed to open under vacuum conditions which allows the air to bypass into the exhaust manifold.

Features a 40mm valve diameter and a purpose designed actuator housing.

Supplied with multiple installation fittings for ease of fitment and fabrication.

Due to the large variety of engine applications, an weld-on outlet flange is required for installation. Turbosmart Weld-on outlet flanges are available to purchase separately.

Turbosmart ALV40 Anti-Lag Valve Kit includes:

  • Turbosmart Gen V Anti-Lag Valve
  • Valve seat
  • Inlet O-ring
  • Inlet V-band clamp
  • Inlet Hose adapter (1.50"/38.1mm OD)
  • Weld-on Inlet V-band flange (1.50"/38.1mm OD)
  • Outlet V-band clamp
  • Collar Tool - (Adjusting actuator and changing springs)
  • Fitting Kit - (2x 1/8” NPT nipple, 2x 1/8” NPT blanking plugs **1x pre-installed**)


  • Both Rival Motorsport & Turbosmart accepts no responsibility whatsoever for incorrect installation of this product which is potentially hazardous and can cause serious engine damage or personal injury.
  • Consult your local tuning specialist before setting up the anti-lag valve, setting anti-lag levels beyond the engines capability may result in engine or turbocharger damage
  • anti-lag produces excessive heat in the exhaust system and may shorten the life of your exhaust manifold and turbocharger.
  • Recommended for race applications only

note: image is for illustration purposes and may differ on delivery

Here you will find all the information you need to know about the delivery of your purchase.

At Rival Motorsport, we pride ourselves on our efficient delivery service. If your item is in stock with us, it can arrive as fast as the next day. However, please note that each product and brand may differ in terms of stock availability, and stock statuses shown on the product page may not always reflect real-time availability.

In the event that you are in a rush for your product, we advise that you call us. Not all stock is located in the same warehouse, and we are reliant on third-party suppliers. Our team can help you identify the quickest way to get your item.

Please be aware that orders can be delayed due to factors beyond our control. From couriers to customs, we cannot always predict or prevent delays. In these cases, we are not liable for any inconvenience caused.

For smaller items, we use Royal Mail First or Second Class, depending on the item. For larger items or items of higher value, we use courier services, typically DPD. You will receive a tracking number and a one-hour time slot for your delivery.

We have established special relationships with brands from around the world, as well as in the UK. This means that even if the item you are looking for is out of stock, we will have priority access to the production queue for new items. In fact, there is a high chance that you will not find the item you need anywhere else more quickly. Our dedicated team works tirelessly to source the products you require and will always strive to get them to you as soon as possible.

Please note that we reserve the right to cancel an order if the items/delivery costs have been calculated incorrectly by our checkout system. In such cases, we will give customers the option to cover the difference if they still want the goods.

Thank you for choosing Rival Motorsport. We hope that this information has been helpful. If you have any further questions, please do not hesitate to contact us.

At Rival Motorsport Ltd, we make sure our parts match your vehicle by double-checking with the latest data from manufacturers. Sometimes, though rare, there might be small differences. So, it's smart to double-check compatibility when you get your parts. This helps avoid problems before you start fitting them.

Just so you know, if a part is marked or damaged from trying to fit it, we can't take it back. Also, we don't cover labour costs, compensation, or other expenses.

Thanks for understanding and choosing Rival Motorsport Ltd.