dave8412  Jun 16 2006 - 9:30am   

Q: What are the different runner lenghts and port diameters for the different aftermarket TPI runners and bases?

A:

Runner Type

Length (in.)

Port (in.)

Stock TPI

7.250

1.470 round

Lingenfelter/Accel

6.625

1.615 round

SLP cast runners

6.625

1.600 round

TPIS large tube

7.625

1.660 round

TPIS siamese large tube

7.625

1.660 round

Lingenfelter/Accel Super Ram*

4.125

1.870x1.970 "D" shape

TPIS Mini Ram

3.500

2.600x1.350 entry

1.960x1.200 exit

Stock TPI Manifold base

6.375

1.470 round entry

1.960x1.200 exit

TPIS Big Mouth base

6.125

1.750 round entry

2.090x1.280 exit

Lingenfelter/Accel

6.125

1.750 round entry

Super Ram base

2.090x1.280 exit

* Runners only