They are a good product. We have had our present one for 10 years now and I just had to replace the pump bellows for the first time last year. Good for another 9 years. Our previous one lasted for 20 years.
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'05 Ford V-10 4x4 SMB "50" White
'00 Jeep Cherokee 4x4 Highly Modified
'04 Jeep Grand Cherokee- wife won't let me modify it. :-(
Does anyone really read this stuff other than surfgeek?