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| Thanks Sledge - just talked with Custom Built Pneumatics and found out that Roots 56 URAI is really a good blower for 4" system, and can realistically only utilize about 25 HP. For 5" he recommends a DuraFlo 4509 or better yet a Sutorbilt 6M (larger, quieter, lower rpms for same airflow due to larger impellers) and can utilize up to 50-60 Hp. | |
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