Engines and Components› Camshafts and Valvetrain

Texas Speed

.660" Polished Dual Valve Spring Kit

$359.99

SKU: 199-PACPOL660SpringKit

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The Texas Speed & Performance TSP .660" Polished Dual Valve Spring Kit is designed to offer excellent valvetrain control for aggressive hydraulic roller camshafts. This kit features American-made PAC Racing polished dual valve springs with titanium retainers and a patent-pending Precision Race Components integrated seat and seal.

Key specifications include a maximum spring lift of .660", an install height of 1.810", closed spring pressure of 160 lb. at 1.810", and open spring pressure of 415 lb. at .660" lift. The springs are polished by PAC to increase overall life and reduce fatigue without losing pressure.
Show original supplier description
The Texas Speed & Performance TSP .660" Polished Dual Valve Spring Kit represents the latest in valve spring technology, developed in partnership with PAC Racing. This kit features American-Made PAC Racing polished dual valve springs, rated to .660" lift, paired with lightweight titanium retainers. A standout component is the patent-pending Precision Race Components integrated seat and seal, which simplifies installation by eliminating the need for special tools and reducing the risk of valve seal damage or displacement. This innovative design is compatible with factory-size valve guides. Technical specifications include an install height of 1.810" with a closed spring pressure of 160 lb. at that height. The springs provide 415 lb. of open pressure at .660" lift, with a coil bind occurring at 1.015". The polishing process by PAC Racing enhances spring longevity and prevents fatigue without compromising pressure ratings. It is important to note that this dual valve spring kit utilizes GM factory valve stem locks, which are not included. Furthermore, this kit will not work on LS7, LS9, any Gen 5 LT1/4 engine applications, and most aftermarket cylinder heads that use bronze guides.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandTexas Speed
Part Number199-PACPOL660SpringKit
CategoryEngines and Components
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy