- intake lengnth
- 6 port timing idea
- need help with carb on pport
- want to make 300 rwhp in an s4 n/a
- 20B NA BP semi-PP ITBs
- 86 GXL Exhaust
- N/a 20b hits record 475rwhp
- Just Bought RB exhaust.. Need advice
- street porting template
- semi pp build help
- fuel system for 13bpport
- pp na lifespan? searched
- My semi pp build (slow progress)
- 3 1/2 minutes of brap
- PP engine ?
- Turbo rotor's in N/A motor
- 4 port na drift moter
- P-Port Build
- How to increase power at high rpms?
- How much power from 6 port
- Time attack 1981 RX-7 with M2R 13BPP Build
- Another thread about exhausts
- s4 213,000 miles dyno
- corksport PS header review
- S5 pineapple large street port
- any opinion on the corksport header for fc?
- port actuators?
- What is my engine build from?
- timing problem...
- Yet Another Exhaust Thread (Again) - RB long primary system
- coolant problems
- Will this work on an FC N/A..Blitz Air Filter
- 1988 13b semi pp build
- not sure which exhaust to run anymore on 13bre NA
- Comments on compression video
- removing stock s4 exhaust manifold
- injector size on 13b peripheral port
- power gains on a budget?
- question on building an shallow oil pan.
- K/N Fitercharger Intake Kit on S5? Need Some Input Please
- How does a K&N air filter make your n/a sound?
- Mallory Ignition Coils for Hyfire 6AL
- rtek or not to rtek? That is the question
- another rtek or not thread
- reducing backfireing
- Modding the Vert
- High horsepower street port
- ITB Dyno Session
- itb's and runner length
- pp intake design. advice wanted
- E Production Ports
- tuning difference's between 6 port/4 port
- Adjustable Fuel Pressure Regulator for S4
- Sand Dragster headers 13B 6port
- Injector sizing Q&A