- Valve springs must have atleast 85lbs of seat pressure.
- Check the valve spring retainer to valve guide clearance at maximum lift. Must have minimum of .030" clearance.
Duration at .050 - 264 degrees
Valve lift - .528
Duration at .050 - 268 degrees
Valve lift - .518
All of our turbo manifolds maintain a 10 year warranty to the original owner from the purchasing date. Our warranty covers all material and manufacturing defects. All of our fabrication is done in house in the USA. We utilize the best material and fabricator available to ensure that you'll never have a problem. We do NOT cover warranty claims on issues caused by you. We also do not warranty second hand owners at this time.