7a Exhaust manifold.

scott 20v · 23-01-11, 06:16 PM

Hi.
Can anyone give me any advice on replacing a cast exhaust manifold on a 7a engine with a tubular one?
Thanks.

mikes2 · 24-01-11, 10:04 PM

you need the downpipe and heatshield as well.

You'll need to drill and tap 3 holes in the inlet manifold to secure the heatshield.

5x new exhaust manifold to head gaskets and 10 new nuts. Just be careful when removing the old nuts. Sometimes the studs can break. If that happens, you'll probably have to remove the head to get it machined.

20vcqdriver · 24-01-11, 10:29 PM

wrap it in exhaust wrap too as the heat from the thing after a fast blast is immense. Made a major improvement in underbonnet temps when I did mine.

24-01-11, 10:04 PM	#2
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	you need the downpipe and heatshield as well. You'll need to drill and tap 3 holes in the inlet manifold to secure the heatshield. 5x new exhaust manifold to head gaskets and 10 new nuts. Just be careful when removing the old nuts. Sometimes the studs can break. If that happens, you'll probably have to remove the head to get it machined. __________________ 1991 90 quattro 20v sport 1991 90 quattro

24-01-11, 10:29 PM	#3
20vcqdriver 4 ring whore! Classic Audi Club Member Join Date: Dec 2007 Location: Wirral Posts: 3,910	wrap it in exhaust wrap too as the heat from the thing after a fast blast is immense. Made a major improvement in underbonnet temps when I did mine. __________________ Coupe quattro 1986:-~450bhp + loooong list of mods! Audi A7 Bi-TDI SLine Black edition 2015 mapped to produce 600lb/ft torque! Audi S4 4.2 V8 cabriolet 2004:-