The 2015+ LT4 and LT5 C7 Corvette Z06 ZR1, 2017+ 6th gen Camaro ZL1, and the CTS V gen 3 all share the powerful LT4 engine and out of the box, have some very high flowing heads with approximately 295 cfm. For some of us, this is just isn’t enough. We need more flow, a more aggressive cam, and want to see 700+ WHP with the OEM blower and 1000+ WHP with aftermarket superchargers.
Here’s what we do! Fully CNC ported intake and exhaust ports, custom intake valve job, custom full radius exhaust valve job, intake and exhaust bowl blending, optional milling for increased compression ratio.
Stage 1 is CNC only
Stage 2 is the trend for boosted engines with smaller ports for higher airflow velocity
Stage 3 is the fully ported windows and all
Stock Specs:
Intake port volume: 295 cc (peak stock flow 309 cfm)
Exhaust port volume: 106 cc (peak stock flow 194 cfm)
Stock Combustion Chamber Size: 60 cc
Stock intake valve size: 2.125″ 96.2 grams (hollow stem)
Stock exhaust valve size: 1.590″ 73.5 grams
Here are some teaser specs of the new Stage 2 CNC porting option:
Intake port volume: 310+cc
Exhaust port volume: 105+cc
CNC flow rate of intake port is 370 CFM at .650 lift with very strong mid-lift improvements using stock 2.125″ valve.
CNC flow rate of exhaust port is 268 CFM at .650 with stock 1.590″ valve!
Core charge is 100% refundable within 15 business days if you choose to return your LT4 heads.
| Stage | Stage 1 CNC, Stage 2 Small Port CNC & Hand Finished, Stage 3 Large Port CNC & Hand Finished |
|---|---|
| Core Charge | No – I'll send mine in, Yes – add $1800 core charge |
Professionally packed and fast shipping
Through our long-term relationship with UPS, FedEx, DHL and many other top global carriers we are able to offer various shipping options. Our warehouse staff is extremely skilled and will package your products according to our exact and precise specifications. Your items are carefully inspected and properly secured before shipping. We ship to thousands customers every day across multiple countries. This shows our commitment to be the largest online retailer on the planet. We have distribution centers and warehouses in Europe and the USA.
It is important to note that orders with more than one item are processed according to the specific item.
We will thoroughly inspect all items before sending. Most orders are shipped within 48 hours. The time to deliver varies from 3-7 days.
Returns
The stock is dynamic and we do not fully manage it because of the fact that many parties are involved, including our warehouse and factory. The actual stock can change at any moment. It's possible that the inventory could run out once your order has been processed.
Our policy runs for a period of 30 days. We cannot replace or refund your purchase after 30 days since the purchase.
The item cannot be in use and must be in the original packaging. It should also be in the original package.
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