PWM Bilstein front coil-over kit

What it contains:

1 pr Bilstein shocks

Upper mounting bracket

Upper inner fulcrum block and bushes

Upper wishbone arms and fulcrum shaft

Modified upper spring locating cup

Modified bottom spring pan

Bolts, screws, washers

Template for cutting hole in crossmember

General description

The kit bolts directly on to existing shock mounting points, both on the subframe and at the upper trunnion.   The only major change needed is a 2″ hole in the top of the subframe on each side, (in the middle of the spring mounting) to allow the shock to pass through (we supply a template).   At the bottom end, the shock attaches to a mount fabricated onto a standard lower spring pan.

Camber Adjustment

The Aluminium block which mounts the upper arm has the fulcrum offset to provide a coarse adjustment.

With the fulcrum in the alloy mounting block offset to the outside of the car, the camber is at its standard setting.  Offsetting the fulcrum to the middle of the car increases negative camber by about 1.5 degrees.

Further adjustment is achieved by inserting spacers between the upper mounting bracket and the alloy block.   (1 degree camber change = 4mm or 5/32”)

Spacers are not included with the kit, but are easily made out of flatbar steel or aluminium

Fitting

The kit bolts directly on to existing shock mounting points, both on the subframe and at the upper trunnion. The only major change needed is a 2″ hole in the top of the subfame on each side, (in the middle of the spring mounting) to allow the shock to pass through (we supply a template). A simple job with a good holesaw if you have one. It can be done without removing the subframe, though it means drilling upwards for a while so some find it is easier to remove the subframe to do it.

Detailed instructions:

  • Remove the old shock absorber and withdraw the coil spring.  (Keep the spring for refitting)
  • Unbolt the spring’s top locating cup from up inside the subframe (approx 3”diameter, secured by two 1/4” UNF bolts)
  • Cut a 2″ hole in the top of the subframe on each side, (in the middle of the spring mounting) to allow the shock to pass through.  Use the template provided to locate the position of the hole. It is a simple job with a good holesaw if you have one.   It can be done without removing the subframe, though it means drilling upwards for a while so some find it is easier to remove the subframe to do it.
  • Assemble the wishbone assembly onto the top bracket using the cap screws and captive nut plates provided.   The fulcrum is offset in the alloy mounting block to provide a coarse camber adjustment and can be fitted either way depending on the initial camber desired.  (Refer above for camber adjustment)

Note: we recommend use of an anti-seize compound with all the cap screws, particularly through the alloy block but also in the base of the top bracket.

  • The top bracket bolts directly on to existing shock mounting points using the cap screws provided.
  • Fit the modified lower spring pan using the original fastenings
  • Position the modified top spring locator onto the top of the suspension spring and fit the spring to the car, ensuring the locator slips over the lower extension of the top bracket where it protrudes through the crossmember.
  • Assemble the kingpin etc to the upper and lower wishbone in the normal way
  • Insert the new shock absorber from the underneath (having already fitted one mounting bush and support washer to the top pin of the shock).    Attach to the lower wishbone with the screws provided and to the top tower using the remaining bush & support washer.

Note:  At the lower end, some shock bodies may need their mounting holes slotted further to match up to the tapped holes in the wishbone pan.   (There are two similarly rated but different models of Bilstein we use, depending on availability.   We have jigged up for the most common one, which also fits best within the confines of the spring mount.   We apologise if this causes any inconvenience.)

Core charges

The core charges cover the cost of replacing core items which are original MGB components that are modified to accept the Bilsteins.    Normally we do these on an exchange basis, so we get the customer’s “old” bits back to modify for the next person.   However, if it is not practical for you to return these items, we can buy in old units from dismantlers.

The core charges work out as follows:

Spring pans                             2 @ $25 ea             $50+GST

Top spring locating cups          2 @ $5 ea               $10+GST

Old shock units                       2 @ $40 ea             $80+GST

(We need the old shocks because we use the original arms & fulcrums from them.)

Total core charges                                                  $NZ140+GST

Price

The following prices are all in NZ dollars and do NOT include freight. (Allow approx 200NZD for freight on exports, 20NZD within new Zealand. We will give a firm freight price prior to confirmation of any order.)

The prices are also exclusive of New Zealand goods & services tax, which is NOT applicable on exports.

Basic Bilstein kit is $1250, exclusive of GST (GST not applicable on export orders) and core charges (refer above).

The core charges cover the cost of replacing core items which are original MGB components that are modified to accept the Bilsteins. Normally we do these on an exchange basis, so we get the customer “old” bits back to modify for the next person.

Total core charges $NZ140.

Recent Posts