SALISBURY 4HU COBRA (FIA APPROVED) DIFFERENTIAL

https://simply-performance-simply-performance-ltd.odoo.com/web/image/product.template/8044/image_1920?unique=0ac235d
Status Icon
Manufactured to order

£ 4,225.00

Exc. VAT

4225.0 GBP £ 4,225.00

£ 4,075.00

Not Available For Sale

  • Brand
  • Type of output shafts
  • Type of LSD
  • Condition
  • Condition
  • Type of Part
  • Made in
  • Quality
  • Features
  • Differential ratio

This combination does not exist.

Brand: Salisbury 4HU
Condition: Reconditioned, New
Type of Part: Genuine/ OEM
Made in: England
Quality: OEM - Original Equipment Manufacturer
Features: Fully rebuilt with all OEM parts

This listing is for a 4HU Salisbury cobra differential. This is a new UK made casing assembled in a variety of different options. If you dont see your preferred specification please ask.

These are very popular for a few different early 60's sportscars. Known as a Cobra casing with the 4 bolt front mountings these were fitted in a variety of AC cars as well as some Astons (with machining), Bizzarrini 5300 and Iso cars (grifo & rivolta). These cases are well made and just like the originals. These casings meet FIA approval and are being used at a range of historic racing events. These particular cases (Crosthwaite & Gardiner ones also available) are drilled with 2 x extra holes for coolers. Threads on these are 1/2 NPT with work directly with cooler fittings. These are supplied plugged. This casing does not have the top 4 holes machined, this can be done if required. Additionally, we made a modification, the front 4 bolt holes have been machined 1/8" further back. This allows for any chassis discrepancies. You can easily space or pack it out. 

The spec on this unit is completely customiseable. This is a unit built in house, our more budget builds are utlising a lot of used componets mixed in with new. We find our best success if from a mix of used and new components. This also keeps the costs down. Whats included:

  • New UK steel cast and machined casing
  • Output shaft housings
  • Output shafts (SPEC TBC)
  • Crown wheel and pinion
  • LSD carrier and internals (SPEC TBC)
  • New clutch plates
  • Full set of Timken bearings and lip seals
  • Used (faced and polished) pinion flange
  • Used rear cover
  • Assembled using new graded bolts 

All used parts are fully cleaned and checked for wear. We do not offer crack testing as standard. Everything is visually checked. We have great success re-using many new parts. These units have all the serviceable parts replaced. Although this listing is the earlier 4HU casing we use the later metric taper roller bearing output shafts (unless you opt for Cobra round flanges). This can be used for cars with inboard brakes as well but you would need to choose the used late flanges or the HD new ones. We can supply these with studs, please ask. Typically for cobra builds we do not install them to make it easier to install in the chassis.

We offer these in multiple ratios as per the box above. Prices change depending on ratios. After your purchase you will get a follow up call so we can ensure we are building the correct version and that the specification is compatible for your car. 

This unit is supplied with an original 45/45 ramped LSD unit. The preload of this is set between 40-60ftlbs but we can adjust depending on your requirements. We also have options for ramp blocks which we have listed as an additional spec.


This is an outright purchase. Your old unit is not required.

Why buy from us?

We are a family business focusing on Jaguar parts, and have been around since 1984. Being Jaguar enthusiasts ourselves, we know how important and difficult it can be to source the right parts to keep your car looking its best. We specialise in new and second hand Jaguar car parts for Jaguars from 1960 to 2002. This covers the full range of XJ6, XJ12, going into the XJS, XJ40, X300, X308 and XK8 / XKR. Additionally, we offer a wide range of performance parts to upgrade your Jaguar. We are always looking to add more parts to our offering. If you can’t find what you are looking for, please get in touch to find out if we could help.

Please note that the products on our webshop are currently only our premium performance parts. Our second hand and used Jaguar car parts can be found on our eBay shop. Feel free to contact us directly for any product queries.