No internal or external shields required; case is SFI 4.1 Certified Uses all stock and aftermarket internals; no oddball parts. Standard bellhousing flange fits Reid Racing's full line of SFI 30.1 bellhousings, as well as SFI 6.x "cans" from Browell, Trick Titanium, Quicktime, and others. Indexing ring on the oversized flange properly centers bellhousing. Front pump can be installed with or without the bellhousing attached. Made by a permanent mold process from heat treated aircraft grade aluminum. This process is stronger, more ductile, and more accurate than competitors' brittle sand castings. Oil pan flanges are thickened to stiffen case. Beefed up oil pump area prevents front case distortion under high horsepower. Minimizes flexing which causes gear misalignment and breakage. This case does not leak! Oil pump mounting bolt holes heli coiled to prevent thread failures. Patented adjustable transbrake release. Adjustment bolt varies both the quickness and the rate of release which varies the reaction time and the hit of the tires. Predrilled for double dump transbrake. Redesigned oil passages radically improves release time of the transbrake and allows instant application. Patented reverse piston bleed hole vents air from piston area and increases transbrake consistency. No need for external shields or bottom straps. Each case is thoroughly inspected at every step of its production. You can be assured that you will not have the problems associated with porosity and misalignment from poor castings or inferior machining as with other cases.Reid Racing Powerglide Transmission Case - SFI Back Half PG2000 Superglide Powerglide Case 2-Piece Permanent Mold Aluminum Casting SFI 4.1 CertfiedPit Stop USAoffers Reid Racing Powerglide Transmission Case - SFI Back Half PG2000 at low everyday prices. Be sure to check out all of our products from Reid Racing including Reid Racing Automatic Transmission Cases.