Great service
Great service. Will for sure order again
By nina P.
Saturday, November 7, 2026 · Customer reviews of US businesses

The Fair Hearing score
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127 reviews
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Heavy Duty Kits Has Over 30 years experience in Supplying Diesel Engine Rebuild Kits, Overhaul Kits, and parts for CAT, Cummins, Mack, Navistar and for other Engines, Call +1-888-642-6460 to order.
HeavyDutyKits.com (heavydutykits.com) has 127 customer reviews on The Fair Hearing, with an average rating of 4.4 out of 5.
127 approved reviews, newest moderated first
Great service. Will for sure order again
By nina P.
Ordered late Friday was here Tuesday, and the best price I could find, good enough for me.
By Duster I.
Great customer service, quick shipping and outstanding pricing. They are everything you want from a parts supplier. I will definitely keep doing business with HD Kits!
By Laura
Stan was Very Professional and Experienced
By Ellerton M.
They advertised the parts were FP Diesel, which is a line of parts by Federal Mogul. I did not see where they openly state we reserve the right to substitute parts of other manufacturers. I received parts in boxes by Maxi Force which don’t even have where the parts are made. Could be inferior parts. Their price is higher than other “discount” heavy duty diesel part manufacturers. Very unhappy with this company. Major aftermarket suppliers often address deficiencies in some of the OEM lines. I cannot be assured this is the case with parts that don’t even show where they are made. Be aware of what you are buying and do not trust their advertising.
By Rich O.
If ypu call don't bout a part & they tell you it's in stock don't take there word on it if you need the part/ parts soon. Happened to me called in they told me the part was in stock. I ordered it, been waiting 2 weeks called to check back in on my order where bouts my order is. They told me it's on back order & they don't have them in stock & havent had them in stock for awhile. Put me in a really bad spot since my truck has been down for 3 weeks. No truck running, No money coming in!
By Greg T.
Jean provided outstanding customer service, very friendly, efficient and professional. The water pump I ordered for my semi arrive on time as he told me and in perfect condition. I would definitely, order more parts from him. Maria
By Maria
YOUr prices have gotton crazy!! talk about taking advantage of inflation...doubling your prices ...i wont buy another product off of you!!
By Douglas F.