Efini Y-Pipe Fitting?!?

[Tiger_kpt]

When upgrading a 1993 UK spec RX7 FD with a newer Efini Y-Pipe assembly and binning the original standard one... what parts do you actually need? The crossover pipe and Y-Pipe and use other existing parts? Or do you need more?

Which part actually increases flow? The Y section?

Can you also use all original fixtures and fittings?

Straight forward swap?

Also what power gains are to be expected?

Just want to plan ahead.

Thanks all.
Kyle.

[Ricco_04]

You will need the \'Y\' pipe and the crossover pipe.  The ones you are getting rid off are joined with two jubilee clips - the 99 spec efini y pipe bolts in 2 places at the y pipe and crossover.

The Y pipe itself has the improved airflow.



have a look here :

http://www.robrobinette.com/efini.htm

[interloper393]

Oooo mines got that fitted

[Hayward North]

I perchased my efini Y pipe and polished crossover from a member on here

[Tiger_kpt]

Thanks for that guys...

What do you guys think to the gains you had fitting the Efini parts over the original? Noticable difference? Or BS?

[interloper393]

id say its more reliable as  it wont split, plus it cn be polished up n looks great lol.. doubt you`l feel any difference to be honest, but this onlong with a few other mods shud make a diference bud

[Ricco_04]

The 99spec ran more boost as standard.  This was due to a re-design on the rear scilencer internals and the Y pipe.  It should help but I guess you will only see a difference in the graph from a dyno.  More importantly it wont crack and is bolted together.