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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
with 1-inch or 1
air ratchets
Machined from heat-treated 4140 chromoly steel
allowing tube-by-tube tuning across the stroke
ARP Chromoly Header Stud Kits Throttle Body Spacers with 1-inch or 1The ARP Chromoly Header Stud Kits provides a more reliable mounting solution for performance headers than standard bolts. The stud design simplifies header installation by allowing the gasket and header flange to be positioned on the studs before fastening, preventing gasket misalignment. Part 91522 is configured for its specific application with attention to fitment requirements. These header studs are machined from 8740 chromoly steel at 190,000 psi
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