Maximum flow is essential to any turbo charged vehicle. The stock exhaust diffuser is very restrictive and not free flowing. The BLITZ Exhaust Diffuser was design to free up tohe exhaust flow by removing the main catalytic converter. With the increased flow, the turbo will respond and spool up quicker. The BLITZ Exhaust Diffusers are constructed of one piece cast iron or stainless steel and utilzes all existing brackets and will retain all stock heat shields.
Notes
For the MKIV Supra, this 3" midpipe is necessary to purchase when you buy any Blitz, Greddy, or HKS Turbo kit. You can not re-use your RMM (or other brand) 3" downpipe with a single turbo kit. This pipe bolts up to the downpipe included in the single turbo kit and extends to your cat-back exhaust for a perfect fit. This pipe is 100% stainless steel.
the product does what is needed but it did not come with the exaust braces, bolts, or new gaskets. The stock cat braces from the block do not bolt up to it! otherwise it is a good product and does what is needed!