How to turn a rusty exhaust manifold into a trick header . L52 engine header fabricat - Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority
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Old May 27th, 2020, 05:15 PM   #1 (permalink)
AWD swapper
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Name: Serg
Join Date: Oct 2010
Location: Moscow Russia
Vehicle: 06/G4/GT AWD 09/G4/spyder
Posts: 197
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How to turn a rusty exhaust manifold into a trick header . L52 engine header fabricat

In order to rebuild an old, rusty motor, you need to go through every single component. As a matter of fact, you'd be better off replacing factory parts with aftermarket goodies. On a Hummer H3, replacing the stock cast iron exhaust manifold is a necessity, due to it being prone to cracking. I've made a high-flow replacement manifold with equal length runners using AISI 304 stainless steel. Each runner is 42.4 mm wide, wall thickness is 3 mm, while the 5-1 merge collector is 60 cm long. These specs allow for increasing engine efficiency and improving exhaust gas flow out of the cylinders on this inline-5 L52 Vortec 3500 GM's engine. This exhaust manifold is durable enough to allow for installing a turbocharger. The manifold was made using a TIG-welder fed with argon. This timelapse video shows the entire process of how the exhaust header was made.

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Old August 21st, 2020, 08:29 AM   #2 (permalink)
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Name: Josh Swiger
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Location: Cambridge, MA
Vehicle: 2012 Eclipse
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Wow, this was totally what I needed. I wish I had seen this before buying a new exhaust.
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