Frankenstein
Assembled – Frankenstein Engine Dynamics LS7 Cylinder Head Performance Porting
Assembled – Frankenstein Engine Dynamics LS7 Cylinder Head Performance Porting
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core charge is $1500- fully or partially refunded once cores are received and deemed good/usable/rebuildable GM stock ls7 cores WITH titanium intake valves
FED specializes in high performance cylinder head porting for racing engine applications. OEM and Aftermarket heads enter FED’s advanced manufacturing processes proven to generate the most efficient power in every application. We take great pride in our work and our attention to detail is unmatched in this industry. With over 100 years of combined team experience we know how to Win! FED’s Porting Process Includes:
- Teardown/Clean/Inspect
- FED’s exclusive high performance porting programs via 5-Axis CNC – Intake/Exhaust/Chambers (Some Chambers Don’t Apply)
- Pressure Tested for Leak Detection
- Precision Newen CNC Valve Job, which ensures near zero runout
- All Cylinder Head Sealing Surfaces Including Ends are PCD Machined, Making Sure all Surfaces are True
- Meticulous Hand Blending and Deburr
- PCD Surfacing Optimal For Modern MLS Head Gaskets
- Final Wash and Assembly
- Extreme Attention to Detail and Quality Control at Every Stage
Lead Times:
- LEAD TIMES MAY VARY. WE TYPICALLY HAVE THEM ON THE SHELF!
Core Charge- Refunded (or partially refunded) once cores are recieved, inspected and deemed usable by F.E.D. on occaison, new valves are required.
Description | Specification | Part Number |
Min. Bore Dia. | 4.125″ | |
Intake Port Volume | 285cc | |
Exhaust Port Volume | 90cc | |
Combustion Chamber Volume | 63.5cc | |
Intake Valves | Reuse Del-West Titanium Intake Valves 2.205″ | |
Exhaust Valves | FED Custom Stainless Exhaust Valve GM LS7 HR S1 – 1.614 x 5.220 OAL x .3135 stem x .290 tip | 914025 |
Valve Springs | .700 Dual Valve Spring by PAC | 914005 |
Retainers | FED Ti-64 Retainer – LS Dual Spring | 914040 |
Valve Locks | GM Valve Lock | 916051 |
Valve Seals | Viton High Heat Seal VS805 .311/.500/8mm | SPRVS805USS |
Guides | CHE Bronze GM LS7 Valve Guide – Intake and Exhaust – .500 x .314 x 2.260 | VG500314226E7BCHE |
Rocker Stands | Stock Rockers. (Trunnion Upgrade Kit Recommended, sold separately) |
Shipping & Returns
Shipping & Returns





Guaranteed Quality
St. Paul Speed & Performance hand selects the brands we offer based on decades of experience in domestic automotive performance and modification. If you ever experience a problem with your order, our representatives are well equipped to help ensure your purchase brings satisfaction.
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Best Available Price
St. Paul Speed & Performance's distribution partners work to provide us with the best possible price for the products we sell. We pass that on to you, the customer. If you find a product you are interested in at a lower price elsewhere, please let us know and we will match that price if we can.
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Returns
We accept unopened items free of charge, excluding shipping fees.
Unfortunately, during this time, we can not process opened items that
would typically have a restocking fee.