Fitted my new exhaust - but it leaks a little...

Smoother is with gun gum :) ... bolt it back it.

Or see if you can align it better, but a paste is more than likely needed.

Allegedly you can use silicone sealent on them. But personally I'd just gum some exhaust gasket on. Full system or cat back?

i would'nt worry about it, it will soon corrode together & then stop leaking.

if it makes no noise then leave it alone.

Cat back. The cat is still in good nick, and doesn't look all that restrictive in terms of pipework.

The old exhaust was lousy, though. Big crimps on the inside of all the bends, losing maybe 1/3 of the diameter...

It *seems* to go better now, but that might be just because it makes the right noises... ;-)

Presumably it's an MOT fail (or at least they'd have to seal it at that point to get it to pass).

Anyway, I got some paste from the local factors today for £3 and it's a ten minute job to pop it back on the ramps and rejoin it.

I need to do that anyway - the only 10mm nuts I had in the garage were Nylocs and they won't last sat right next to the cat, so I've got some plain nuts to put on it instead now too.

Extra 20bhp for a cat back

minor leaks are not a fail.

Even better. And I've tweaked the airbox as well - the simple way with a series of 25mm holes before the air filter. Dunno if iut helps but it doesn't seem to have hurt. I just fancied fiddling with it 'on the cheap'.

And yes I have told the insurance - alloys, modified air filter, modified exhaust. Added about £40 to the renewal price. It's nice being old(er) ;-)