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    Haibeck Automotive Technology

Top End Porting

The plenum ports are opened up to the maximum that the castings will allow. The injector housing ports are enlarged to match the plenum ports. The fuel injector bosses are reduced in size. On the '90 - '92 engines the primary fuel injector bosses are removed. The throttle body is enlarged from the stock 59 mm to 63 mm. Finally, in the air horn, intrusions related to the alternator and air conditioning compressor locations are reduced in size.