Euro 308GTB 1980 Exhaust Manifold replacement

I did mine when I had the gas tanks out, so access wasn't that tough. The nuts are brass (mine look more like copper) so they come off easily. The connection from the header to the first pipe (the steel bolts with springs) are the frozen ones. Removing the gas tank isn't that hard, makes it a lot more accessible, and easier to remove the header.

 

Have a look at PD Gough in Nottingham as they do some great quality stainless ferrari systems at reasonable prices. They did an exhaust box for me and comes with lifetime warranty to the 1st buyer

 

My mechanic once said that the stock manifolds are quite a bit of a restriction for the engine to "breathe free". I don't know if there are replacement manifolds available with a bit of a larger diameter. Should I ever have to change them I would certainly look for these. Bigger diameter exhaust manifolds with slight adjustment of the carb jetting should give a noticable increase in power/drivability, he said. Just what a 308 could use, in my opinion !

 

Hi Andy,

I would definitely vote for the latter option, if the price is competitive. Why? When they make your manifolds with your old ones as a template, chances are high, that you can just throw in the new ones.
I have heard of a lot of off the shelf exhausts and manifolds, which required a lot of adjustment with the help of heating and bending. If this happens to be necessary you will need a powerful torch.

Best
Martin

 

I hope so
And I would also support the smaller less known businesses, especially in the UK, which is famous for their passionate little workshops and factories supporting classic car owners.

Best Regards
Martin

 

Andy,
I am pretty sure you'll need to take the drivers side (in your case) fuel tank out to give you enough room to manouevre the manifold out.

I also needed to take out the alternator when I changed mine (back to standard manifolds)

I had the added fun of AC but I didn't need to move the pump but it did make it a bit more difficult

Access to the manifold nuts is quite tricky and flexible and jointed socket extensions helped a lot!

good luck

 

Give Richard a ring at PD Gough and see what he quotes, you might be surprised. They sell them under the Nouvalarie name in the us. If he supplies Superperformance it is news to me, but i might be wrong

 

Ouch. I'm sure you're right about the complexity. I saw a 250 GTO getting a beautiful s/s exhaust made at a place opposite my old Alfa's garage. I don't recall the name but it's on Nunn Brook Rise in Huthwaite. They were very well regarded and were also doing more prosaic machinery when I popped in; may be worth one last try. As already said, a templated one will likely fit with very little effort which has to be worth a few £..

 

Well it was worth a try, on their web site they have a gallery with pics of the systems they make or u can take a pattern. Remember super perfornance prices are without vat.

 

I've just had new Superformance stainless manifolds and pipes fitted to mine which are mated to a Nouvalari silencer. Really pleased with the result and it sounds better too.

I wasn't brave enough to change them myself though.

 

Andy not sure I will be an inspiration after you get stuck in!

I didn't need to Indio the mounts but I'd I recall I may have had to jack the engine up a bit!

The alternator seemed to be the most difficult to wriggle through the chassis tubes



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Andy, get a cheap thin-walled 6-point 13mm socket and a couple of short wobble extensions for the manifold nuts. I used 1/4 inch drive to allow more space. If you have a compact electric or pneumatic ratchet it helps a lot. Put penetrating oil on the rusted exhaust pipe bolts/nuts (I heated mine with a small propane torch and then sprayed them-- keep a wet cloth behind the flame and a fire extinguisher handy!)

 

Hi Andy,

don't know how much leisure you have, but it sounds easily doable within 5 months.
BTW. I also want to replace my tank crossover hoses this winter. What's the best way to drain the tanks? I'm a bit afraid of this job. I have my garage inside the house and would prefer to do it outside, but now that I have a lift.....

Best Regards
Martin

 

I drained my tanks in the garage with door open and a fan blowing out. Had about 4 gal fuel. Drained via the plug in the bottom cross over pipe. Make certain the catch bucket can handle gas and doesn't melt.