Designed to fit the standard 23 degree small block chevy cylinder heads, these bolt-on turbo headers are the perfect solution to any turbo header packaging concerns. Made of heavy wall, American Made stainless steel pipe, these modular log manifolds can handle the heat and vibrations that come from a turbocharged engine build. They are a great bolt on turbo header for nearly any factory or aftermarket small block chevy turbo header application. Maybe you are gearing up for street racing and don’t want to waste time fiddling with an ill-fitted header. From the street to the track, a custom header is key to your car attaining peak performance.
Header wrap or exhaust wrap is a very effective way to reduce under-hood temperatures. It works by insulating the header tubes retaining the heat inside the headers and greatly reduces the heat radiating from the headers. It can be used in nearly any application and is available in black, white, and titanium colors (titanium is shown below). It is easily secured to the header tubes using header wrap ties or stainless steel hose clamps.
It had slightly reduced power compared to the L and used a different PCM. The L21 was paired with the early 4-speed Allison automatic transmission or manual transmission, depending on the application. Beginning in 1969, the highest performance 427 models were fitted with the new open (vs. closed) chamber cylinder heads, along with design improvements in crankshafts, connecting rods, and pistons, adopted from the Can-Am development program. The first iteration of the W-series engine was the 1958 "Turbo-Thrust" 348-cubic-inch (5.7