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New ATP automatic transmission flexplate for 77-78 Oldsmobile 403 engines with TH350 transmissions. This is a stock replacement flexplate.  See notes on 403 engine below.  Fits the following:

77-78 Firebird/Trans Am w/ 403 Olds engine

TECHNICAL SPECS:

TEETH : 166
OUTSIDE DIAMETER : 14"
CONVERTER BOLT PATTERN : TH350

NOTE : 77-78 403's are a SAE bolt pattern whereas 79 403's are a metric bolt pattern.