I have the Pro-m 75 with 24lb injectors. You won't notice much of a differenc by itself with a lot of the stock parts still on the car. If you plan on upgrading (heads/cam), then it is probably worth it. I used to have idle surge and stalling problems when it was cold out. I put the stock airbox w/ K&N back in, adjusted my idle (600 - 700 on factory tach), and reset my TPS to .98v, been perfect ever since.
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1989 lx notch
89,000 miles
bolt-ons,stock heads/cam
60'- 2.07, 8.90@78, 13.93@99
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