I HAVE A 89 CRX SI CLUSTER AND I HAVE A HF CLUSTER FOR SALE.BOTH WORK PERFECT.Both have tach's.these are the square style found in the 88-89.they both take the green tach plug so they will work on an year (90,91) as long as u have the square cover like the 4 door coupe or 88-89 rex.The only differnce is the SI rev limit is 6500 and the HF is 5500rpms.both tach's go to 8k. $30 ea. located in clearwater.