D-style exhaust ports on L98 heads

Reply Subscribe

Thread Tools

Search this Thread

Sep 13, 2001 | 11:10 PM

86IROCTHD

Thread Starter

Member

Joined: Aug 2001

Posts: 483

Likes: 0

From: Dallas, Tx

Car: 88 Trans Am

Engine: lt1 intaked 355 makin 277 on 25 psi of fuel pressure and stock timing :)

Transmission: A4 stock... that moved a mobile dyno a foot shifting into 2nd :)

D-style exhaust ports on L98 heads

hey whats so good bout these ports? i was gonna port match my heads to my header gasket but dont know what i should do? please help

Sep 14, 2001 | 01:59 AM

Kevin91Z

Moderator

iTrader: (1)

Joined: Jul 1999

Posts: 10,950

Likes: 26

From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

The shape and size of them promote better flow. The L98 heads have great exhaust flow numbers.

As long as your header opening is larger than the exhaust port, you're fine. That means Edelbrock headers wont fit. The best ones I've seen are the SLP 1 3/4".

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-