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4 Cyl, 138 cid (2.3L)
- High Output (VIN A, 8th digit)
  - horizontal bolt manifold brace
  - vertical bolt manifold brace
- Without High Output
  - (VIN D, 8th digit)
4 Cyl, 151 cid (2.5L, VIN U, 8th digit)

Engine Assembly for 1991 Pontiac Grand AM

Fits: 4 Cyl, 138 cid 2.3L High Output VIN A, 8th digit horizontal bolt manifold brace (change)

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