Arguably the finest exhaust manifold made. This is the only cast aluminum exhaust manifold that could be considered a true header. The runners are computer designed for uniform cross sections and are all 32" in length. The price is comparable to standard exhaust manifolds and the performance will rival double wall stainless steel headers."
We guarantee it will out-perform any cast aluminum exhaust system!
That is a promise no one else dares to make!
The innovative Thunder & Lightning bolt-on cast aluminum exhaust header boosts your engine's performance 35-100HP! This unique foundry-tough cast tube style header incorporates four individual water jacketed 32" long runners and easily bolts on to most big block Chevy marine engines, including Mercury Bravo, Speedmaster, and Volvo installations.
Call for pricing 302-521-0123

How much?

We are selling the Thunder-N-Lightning Cast Aluminum Exhaust Headers for $2900.

Happy with mine ... troublefree Headers ... 7 seasons and counting !

Yep,
The best header made, I have (2) new sets sittting in the garage, waiting for my next engine build, since I can't install them on my 600SCi's!
Dean

Dean, if you wanted to drill some extra holes in your Cyl. head on your 600sci they will fit!

What kind of warranty is offered?

3 year warranty on the Thunder N Lighting's Exhaust.

Just bought a barely used set of these from a friend. Have two questions, 1) do you sell the stainless barb fittings for the tails? 2) which bolts do you recommend for aftermarket .300 raised exhaust ports and these manifolds? I plan to buy the gaskets from you that go between these and tails. Thx!

How do they stack up to a CMI for weight?