Custom Pipe Bending and Exhaust Fabrication Specialists

HOW TO BUILD A PERFORMANCE EXHAUST MANIFOLD - PART 3

 
THIS MONTH WE GET THE TIG WELDER OUT AND FABRICATE A STAINLESS STEEL MANIFOLD FOR A JAG XK ENGINE. FORGET TRACEY EMIN - THIS IS ART

We’ve looked at the theory and we made the collectors last month, now it’s time to get the TIG welder out and create our manifold. We’re making a manifold to fit a Jag E-type but the rules are the same whether it’s a manifold for a bike engine or an American V8. Make the merge colletors first and position those where you want the manifold to finish. Now you’ve got a target to aim at.

The tricky part is getting the primary and secondary lengths equal and within the confines of the engine bay. And for our 3.8-litre XK engine that’s 46cm primaries and 50cm secondaries. Our step-by-step guide overleaf details the stages when all goes to plan but put plenty of time aside for planning and preparation.