A ported head increases airflow by reducing restriction therefore more high rpm horsepower. Increasing head flow creates more horsepower at the same boost level and works very well with aftermarket cams.
LSJ: All flowed at 28", 3.5" bore plate, exh had a 1 5/8" flow tube, and stock valves (int. 35mm, exh. 30mm). Do NOT be fooled by other venders flowing heads without a flow tube, in the real world people run headers, not open heads without headers or manifolds attached.
(These numbers are an LSJ head, LE5 heads will flow very similar)
| Lift | Stock Intake Flow | Ported Intake Flow | Intake % Gain | Stock Exhaust Flow | Ported Exhaust Flow | Exhaust% Gain |
| 0.100" | 76 | 77.5 | 1.9 | 72.5 | 72.5 | 0 |
| 0.200" | 152 | 152 | 0 | 138.5 | 146 | 5.4 |
| 0.300" | 216.5 | 219.5 | 1.4 | 156 | 172 | 10.2 |
| 0.350" | 232 | 244.5 | 5.4 | 158.5 | 178 | 12.3 |
| 0.400" | 242 | 260.5 | 7.6 | 161 | 182 | 13 |
| 0.450" | 247 | 269.5 | 9.1 | 163.5 | 185.5 | 13.5 |
- Gasket match
- Polish and blend runners
- Blend Bowls
- Reground valves
- Reground valve seats
- 82# Valve Springs & Titanium Retainers (included)
- Fully assembled minus cams
Core charge drop down:
For the heads that this applies to this amount is refundable when you return your stock head. LNF/LDK/LHU options include a brand new head core, so there is no core charge. We will not need your stock LNF/LHU/LDK head. If your core head needs repairs, the core refund will be docked to cover the repair.
Cores are subject to inspection and you will be charged appropriately for any repairs needed; i.e. broken valve guides, studs, bent valves, etc. Each repair will be noted and you will be contacted to pay the difference before your order goes out.
Each head comes fully assembled minus cams, rockers, and lash adjusters.
Ported heads are built to order. Current lead time is approximately 4-6 weeks.
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