ATI GM LS 6.325 Harmonic Damper - SFI

It all started in an unassuming general rebuilding shop in Silver Spring, MD over 55 years ago and it has been growing ever since and continues to operate as a family owned business by members who are passionate about racing. We are talking about none other than ATI Performance Products, Inc., a leader in the industry of high performance parts.

You don’t get this successful by ignoring things like the newest in technology and the need for extensive testing done under racing conditions and ATI certainly did not neglect either of these. These along with their attention to the smallest detail have earned them their place in the aftermarket performance arena.

And if you are in the market for a transmission you won’t be disappointed because ATI offers a multiplicity of transmissions of incomparable quality. The Powerglide transmissions come in a variety of choices such as the new Superglide 4, touted to be the strongest Powerglide in the marketplace and for use in high horsepower race cars, pullers and monster trucks with an application base for Chevy, Ford, Mopar and Toyota.

Another impressive option is the Super Glide 2 with a horsepower of 2400 HP that is perfect for high performance horsepower racing cars, pullers and monster trucks and with ATI’s impressive features such as the ATI SuperCase® &Tailhousing, the ATI Billet Aluminum Super Pump and others. And if you need the added reliability of a heavy-duty application then the ATI High Impact Powerglide Racing Transmission might be just the ticket for your racer that produces more than 1500 HP.

Or maybe the Straight Cut Proglide, ATI’s favorite Bracket 7 Super Gas Proglide transmission is for you with its 9310 Straight Cut Gear Set. And you drag racers check out the Footbrake Proglide designed for automatic drag racing. For 3 speed Turbo 400 racers consider the impressive TH400 Transmission by ATI and if you have an older racer designed between 1969 and 1981 with a GM Turbo 350 check out the ATI TH 350 Transmission. Check out these and the others available from ATI and you won’t be disappointed when you are searching for a racing transmission.

And if you are not happy with an inexpensive and unimpressive damper that is prone to breakage then consider the ATI dampers that are available in three choices, the ATI Standard Dampers that are sure to eliminate harmful crankshaft harmonics and thus eliminate HP loss. And if you prefer serpentine grooves in the outer shell so that you can drive accessory belts than take a look at the ATI Serpentine Dampers and if you need to accommodate blower belts then the Supercharged Damper with grooves machined into the outer shell might be the one for you.

The above products are a testament to the innovation in design and to ATI’s commitment to the racing community and to this end ATI is the proud owner of over a dozen US Patents with more pending. If racing and success is for you then check out the impressive array of products from ATI and help yourself get to the winners circle.

Review our return, cancellation, shipping, warranty, and product image policies before ordering.

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California Residents: Prop 65 WARNING: This product MAY contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov

California Residents: TIRE WARNING: LMPerformance will not ship Tires to California.

Legal: Some or all of these parts may not comply with Federal, State, Province, and/or Local laws, ordinances, and regulations. Buyer takes all responsibility to ensure that any modifications or upgrades that have done conform to all applicable laws and regulations for road use, especially pertaining to safety and emissions. LMPerformance is not responsible for buyer not complying with Federal, State, Province, and/or Local laws, ordinances, and regulations. This policy shall be in force for all past, current, and future purchases from LMPerformance, Inc. LMPerformance will not ship ANY non-CARB compliant products to California where California requires products to be CARB certified such as Catalytic Converters and Induction Kits.

Free Shipping: Please note FREE Shipping refers to shipping within the contiguous continental US only. All other locations extra. Some items that require Truck Freight Delivery will require a Truck Freight surcharge. This surcharge is still a discounted shipping amount that is lower then the actual truck freight shipping charge that is charged to LMP. LMP will try to still give the lowest price possible for truck freight items.

Images: Images may be a representation and may not reflect the actual product. Examples would be SPEC stage 3 clutch kits which all use the same photo.

TYPOS: LMPerformance tries to present the best most accurate information on our website. Sometimes we get mistakes in product information sent from vendors such as typos. We can not be responsible for these typos, if you see something that does not look right please let us know before ordering so we can double check for you first. LMPerformance will not pay for typos in any way, monetarily or otherwise.

Price Errors: In the event that a product has mistakenly been listed at an incorrect price, We reserve the right to refuse or cancel any orders placed for product listed at the incorrect price. We reserve the right to refuse or cancel any such orders whether or not the order has been confirmed and your account charged. If your payment type has already been charged for the purchase and your order is cancelled, a full refund to your orignial payment method in the amount of the incorrect price will be issued.

Special Order ITEMS: Some items are Special Ordered and may not be returnable, or even cancellable as they are going into production specifically because you ordered them. Special Ordered items can have a 5-35% cancelation fee.

Cancellations: Instock orders cannot be canceled due to our automated ordering & fast shipping system. To keep our prices low, all cancelations are subject to a 5% cancelation fee to cover transaction processing fees. We reserve the right to charge up to a 10% cancellation fee for cancelled orders due to merchant fees, Special Order fees and the cost of processing and shipping orders.When you request a cancellation of an order or a part, please note that it may take time for a manufacturer to cancel an order if the order is drop-shipped. We also have to confirm that the product has not shipped. If the product has shipped then this must be processed as a return.Also note that sometimes products ship more quickly than expected, so we recommend that you do not purchase alternative products until receiving final confirmation of the cancellation.

Returns: We cannot accept returns on parts that have been used or installed. No returns will be accepted after 30 days. All Returns must be in original packaging. Prior authorization must be given before any return can be made. Up to a 25% Restocking Fee may apply. Special Orders may be subject to Additional Manufacturer Restock Fees as well. Shipping cost will not be refunded.Hoods as well as PCM Programmers may not be returned unless defective and only for replacement. ALL returns must be first filed using our online form found here: https://www.lmperformance.com/returns.

Lost Order Claims All lost order/package claims must be made within 5 days of the shipping date or tracking information delivery date. All claimes made after this date will not be accepted due to Shipping companies policies of filing loss claims.

Damaged Items or Incorrect Items: Please contact us right away if your item has been damaged in shipping or are incorrect. Please note that we will ship replacement items the same method of shipping the order was originally placed for. LMPerformance can not ship packages overnight at our cost if the original shipping was not also overnight. Claims must be filed in order for replacement parts to be shipped.

Warranties:Any warranty claims must be placed with the manufacturer. All of the products sold by LMPerformance, regardless of the manufacturer, are designed for Racing and Performance applications. Many of our manufacturers offer NO WARRANTY on their products, either stated or implied, due to the unusual stresses placed on the parts and because we have no control over how they are installed and used. Many of these products are designed for off-road use only and are not legal for use on public highways. If you have a question about the warranty on a specific product, please e-mail or call us. Buyer assumes all risk and liability associated with these products.

Installation: We are not responsible for or any costs associated with the installation or the improper installation of any products. Purchaser assumes the risk associated with the installation of products. We, along with the manufacturer of each product are not responsible for any direct or indirect damage to the vehicle, personal, or costs incurred from the use of products.