Fiat 124 "Donut" Gasket for RoadsterSport/SystemOne Crosspipe

DESCRIPTION

Replacement factory "donut" style gasket for the junction between crosspipe and midpipe on 2017+ Fiat 124 using our Crosspipes.

If you have a leak at this junction, replacing the gasket might be the fix.

Note this will not stop condensation weep at this joint. It's a moving joint, metal on one side, condensation passing through that sort of flex joint is going to happen and we see it on these cars brand new from the dealership. But if you feel 'puff puff puff' actual exhaust gases leaking then consider a replacement.

Note this gasket comes in packaging that says MAZDA on it because same item used on header outlet of NC Gen Miata.

Brian's Notes: Think of this graphite impregnated gasket as much like a number 2 pencil, as the round side of it rubs into the new home in the 'mouth' of the midpipe it builds a transfer layer. The springs push it into that midpipe mouth and as you drive the engine wags and wags and wags it back and forth in hundreds of little micro movements per mile. That process builds up more and more of the graphite as a transfer layer in the mouth of the midpipe.

This style of gasket never gets water tight, it will always drip condensation at that joint, but it will seal better and better with some miles as the transfer layer is built up. I recall Summit Racing had a chart on sealing properties of header gasket materials, rating graphite just 3 out of 5 for sealing properties. But the advantage is that it can be used in a dry flex joint, as they did here, to help reduce the impact of engine movements wagging the entire exhaust system.