Koni or Spax

[Bob Falfa]

Koni are more expensive, and Spax are adjustable on the car. So what makes Koni so much more expensive?

[Coskev]

Went from Spax adj with Spax springs over to Koni adj and Eibach springs on my old Cosworth and the difference was massive.
Handled better,was not as harsh on the road too

[Cooky]

Neither fit Ohlins
HTH

[SB - Nigel]

check out Avo

[RW774]

Bump and rebound needs careful calculation and correct damping is bespoke to individual vehicles.Damping needs to be set up on a weight table, with valveing interchanged within the damper until the corect setup is achieved. What is available over the counter has a broad application, with the rebound set via adjustment on the damper. In other words , a compromise . Really they are all much of the same.

[SB - Nigel]

Agree with above but some are designed specifically for the vehicle

OP doesn't say which vehicle but as he has a TVR Chim check out Avo

Ring the manufacturer and ask what work they did to match their product with your vehicle

Oh and if it is a TVR Chim then changing bushes may mean you can keep existing dampers - good luck

[Sam_68]

Cooky said:

Neither fit Ohlins
HTH

If you've got pockets that deep, you want Penske's.

In answer to the OP's question, though, quality costs.

Cheap adjustable dampers give you a range of fairly coarse adjustment settings, but if you set all four to the same setting and get a dyno printout, you'll probably find that there's actually a fair amount of variation between them due to manufacturing and materials tolerances.

Decent non-adustable dampers don't give you the adjustability (obviously), but are more consistent at their fixed setting so, if their valving is well matched to the car they're being fitted to, they'll work better than the cheap adjustables.

If you want quality, consistency and adjustability, you'll have to be prepared to pay big bucks.