How to make and fit your own cat bypass on a 944

The de cat on my red S2 was a lot of money, so i thought i’d make and fit a straight through pipe in place of the cat on my cab. my biggest problem was getting the car high enough to drop the exhaust. i have since found a method of getting the car really high, without axle stands.

But thats for later, on this job low axle stands were used.

I removed the whole exhaust including the exhaust manifolds, once off, i cut out the cat.

Easy! i found a company on ebay that will supply the length you want, and swage the ends so they fit over your old exhaust ppes.

Dont forget to add about 2 inches each end to slot the new pipe over the original.

I also decided to do away with the small second silencer and make the join just before the rear axle beam.

The photos show the process step by step, i guess my total cost was under £30.

Noise wise it is nowhere near as loud as i expected! in fact not much difference, i think it picks up a little quicker but that could be just my imagination. a trip to santa pod will show if there is any real improvement.

The only problem is how close the pipe gets to the rear brace and cross beam.

Mine rattled when i first fitted it but i have now modified the alloy cross member and center of the beam with a angle grinder.

Now no rattles and i do not this small mod weakens the bracket at all. many years of shaving weight of race motorcycles behind me!

exhaust off and cat cut off
good reason to dump the catalytic converter
just kept the one back box
cross brace modified
modified cross brace and beam

Porsche 944 up rated drop links for a tenner

This article is how to build your own up rated drop links for a tenner, these retail for about £70 on ebay. first you need to source
2 x Right hand thread M10 Male rose joint also known as rod ends.
2 x right hand thread M10 female rose joints
2 x M12 nuts.
2 x M10 x 30mm bolts
4 x M10 Nylock nuts
You can buy the rod ends from motor sport factors for around £7 each, but i found cheap ones on ebay for £3 each, and they have not failed yet!
First remove one drop link, it is a very easy job, you just need 2 19mm spanners or a ratchet and socket 19mm.
The drop link is accessed under the rear suspension arm, it is held in place by 2 19mm nuts, one top and one bottom.
remove these and pull off.
Next screw the male and female rod ends together, i use a lock nut and set them with an extra 10mm of length to just stiffen the back up a nats cock.
Tho i doubt if it will make a noticeable difference.
when refitting the new drop link i used a M12 nut over the top stud, this made a perfect spacer to keep the drop link verticle.
i used new nylock nuts and a new bolt on each side, but you can reuse the originals.
the pictures should help, put the link on the top mount first then jack up the arm a little until the holes line up, then just slide the bottom bolt in.
tighten nuts up and do the other side.
Job done

bottom of drop link, 944 rear suspension
original drop link and parts to make new one
parts assembled
Using 2 bolts to get the length the same
M12 nut at top to act as spacer
new nuts and bottom bolt