Hays, Kansas · Porting full time since 2002
Powerful induction. Proven at the track.
Custom CNC cylinder heads, hand porting and burr-finished manifolds — sized to your combination, from Comp Eliminator to the weekend bracket warrior.
20+ yrsPorting heads
1,000+ hpSBC results
NHRARecord holders
Wet flowIn-house
What we do
Services
Heads are finished per application with many options — NA, nitrous and turbo.
CNC Cylinder Heads
SBC, LS, BBC and Ford CNC programs developed in house, with flow sheets and real results behind them.
Hand Head Porting
Hand porting on any domestic cylinder head. Small block from $2,000, big block from $2,200, “econo” from $1,000.
NHRA Super Stock
Years of 23º R&D. Edelbrock, Dart, OEM iron & aluminum, World Products and GM 243 LS1 legal packages.
Burr-Finished Manifolds
A hand burr style that’s always being duplicated. You might be disappointed in the looks — but not the performance!
Flow Testing & Evaluation
Chad will flow and evaluate your heads for free — you just pay return shipping. Get an honest recommendation.
Valve Train, Cams & Consulting
Performance valve train kits and components to finish your build. Custom cams and professional consulting available.
Why SRH
We’re all about results
From NHRA records to working with major cylinder head companies — service after the sale is priority.
My promise
If heads you buy or have ported by SRH don’t perform like we discussed, send them back and I’ll work on them until they do — free.
Trade-in program
Buy new SRH heads and trade back toward newer offerings as your program grows.
Real flow data
Saenz D680 bench with PT Black Box II and Audie software, plus in-house wet flow.
Top components
PAC, PSI, Victory, Manley, REV, K-Motion, Ferrea and SRH components.
From the store
Popular heads
Published packages with flow numbers — order online or call to size one to your combo.
SRH Nation
Dyno & track proven
Most builds are not max effort. Dyno numbers don’t tell the entire story — ask about ETs and lap records too.
| Engine | Result | Heads / induction |
|---|---|---|
| 400 SBC 13º | 1000+@9800 | v3.00PF/13º |
| 401 SBC 23º | 1009whp (v2.72AR/23º) 8.90@3750lbs | — |
| 437 SBC 13º | SBC- 1022hp@8500/677@7300 | v3.00PF/13º |
| 505 BBC | 1040hp | v4.20IR/BBC |
| 565 BBC | 1025hp@7500 | v4.00AD/BBC |
| 565 BBC | 1100hp truck puller | v4.20IR/BBC |
“Terry Walters and I did a mud motor that had to have iron heads. Chad Speier did the heads. 454 made 850 hp and kicked butt. If you want proven porting skills on iron heads call Chad.”
— David Vizard
SRH in the news: Hot Rod Engine Masters Challenge (Throttles Pontiac, Henderson/SRH), Chevy DIY, Dragzine, Chevy Hardcore, and David Vizard’s Big-Block Chevy book.
Past work
From the shop
A few recent heads and manifolds out of the Hays shop.
Ready to make more power?
Tell Chad about your combo — heads, manifold, class and RPM goal.