<p>*Pump gas compatible for intermittent or under 90 degree ambient temperature use<p> Pump gas use recommendations: <p>• This pump is compatible with pump gas, but is not recommended for street driven vehicles where the ambient temperature is regularly above 90 degrees <p>• For street driven vehicles in high temps with pump gas, Earl's recommends part numbers 1200600ERL or 12-800 for optimum hot fuel handling<p>• Proper fuel system engineering is critical for maximum performance. Please see <a href="http://documents.holley.com/holleyfuelsystems_chart1.pdf">Holley Fuel System Chart</a> for information about proper installation of your fuel system.<p> Will work with E-85 and Diesel!<p>These pumps do not have an internal bypass. A bypass style regulator and return line are required.<p> NOT FOR USE WITH METHANOL!<p> <b>This pump is not designed to use a standard conical seat style union in the inlet or outlet of the pump. Example: <a href="https://www.holley.com/products/plumbing/adapters/an_to_an_adapters/parts/AT981508ERL">Part # AT981508ERL</a>. Use of this style fitting will block flow and WILL lead to poor performance and pump failure. The ONLY correct fitting to use is a contoured port fitting with an O-ring seal such as :<a href="https://www.holley.com/products/plumbing/adapters/special_purpose_adapters/parts/AT985008ERL">Part # AT985008ERL</a>. </b>