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International Order Notice:

International orders are required to be paid by money order or bank transfer. Please call or email for more information before placing your order. International import taxes and duties are the responsibility of the purchaser and are not the responsibility of Modern Muscle Performance / Modernmusclextreme.com.

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We Currently Do Not Accept American Express

PSI Performance Springs

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03-08 5.7L HEMI 1511 Beehive Valve Spring Kit

Price: $515.95

PSI-57CAMP
03-08 5.7L HEMI 1516 Beehive Valve Spring Kit

Price: $675.00

PSI-57CAMP
6.1L HEMI 1511 Beehive Valve Spring Kit

Price: $515.95

PSI-61CAMP
6.1L HEMI 1516 Beehive Valve Spring Kit

Price: $674.95

PSI-61CAMP-1516
6.2L Demon/Redeye 1511 Beehive Valve Spring Kit

Price: $489.95

PSI-DMN-1511
6.2L Demon/Redeye 1516 Beehive Valve Spring Kit

Price: $649.95

PSI-DMN-1516
6.2L Hellcat/TrackHawk 1511 Beehive Valve Spring Kit

Price: $489.95

PSI-HCCAMPKG
6.2L Hellcat/TrackHawk 1516 Beehive Valve Spring Kit

Price: $649.95

PSI-HCCAMPKG-1516
6.4L 392 VVT HEMI 1511 Beehive Valve Spring Kit

Price: $489.95

PSI-64CAMPKG
6.4L 392 VVT HEMI 1516 Beehive Valve Spring Kit

Price: $649.95

PSI-64CAMPKG-1516
PSI 1511 Valvesprings

Price: $299.95

PSI-PSI1511ML
PSI 1516 Valvesprings

Price: $320.00

PSI-PSI1516ML

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Modern Muscle Performance
340 Colonel Lee Road
Martinsville, VA 24112
Phone: 276-666-1934

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Monday: 8:00 AM to 5:00 PM
Tuesday: 8:00 AM to 5:00 PM
Wednesday: 8:00 AM to 5:00 PM
Thursday: 8:00 AM to 5:00 PM
Friday: 8:00 AM to 5:00 PM
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Rates from 0-36% APR. Payment options through Affirm are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lenders Law license. For licenses and disclosures, see affirm.com/licenses. For example, a $800 purchase could be split into 12 monthly payments of $72.21 at 15% APR or 4 interest free payments of $200 every 2 weeks.

Modern Muscle Xtreme Newsletter

Email *

MMX Custom Product Payment Method

International Order Notice:

International orders are required to be paid by money order or bank transfer. Please call or email for more information before placing your order. International import taxes and duties are the responsibility of the purchaser and are not the responsibility of Modern Muscle Performance / Modernmusclextreme.com.

ModernMuscleXtreme.com Accepts:

We Currently Do Not Accept American Express

Sales Tax: Sales tax at Modern Muscle Xtreme (MMX) and its subsidiaries is based on State and local requirements. For more information, please reference our Sales Tax Policy page.

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